UNIDAD EDUCATIVA MONTE TABOR – NAZARET
Área de Ciencias Experimentales
Actividades Refuerzo Académicas y/o
Preparación Examen Remedial
2015 - 2016
NOMBRE: _______________________________ CURSO: 9NO
FECHA: ________________________________
PROFESOR/A: ALICIA TOLEDO
Instrucciones para exámenes remediales:
Para apoyar al desarrollo de destrezas y contenidos de la asignatura en base a los temarios de supletorios
publicados en la página web se recomienda trabajar las siguientes actividades académicas a realizarse en
casa previo a las fechas de exámenes remediales. Adicionalmente para el estudio y preparación es
necesario utilizar las diferentes herramientas trabajadas durante el año lectivo como actividades en clase,
tareas, lecciones, evaluaciones sumativas, exámenes quimestrales y actividades de preparación exámenes
supletorios.
Semana 1
Matter in Motion
Circle the letter of the best answer for each question.
1. What would you call a building if you compared it with a moving student?
a. a reference point
c. a ruler
b. a compass
d. a beacon
2. When something changes position, what is it doing?
a. It is static.
b. It is a reference point.
c. It is lubricated.
d. It is moving.
3. What two things does speed depend on?
a. velocity and friction
b. velocity and time
c. distance and friction
d. distance and time
4. What is the SI unit for speed?
a. kilogram
b. newton
c. m/s
d. m/s/s
5. What is a way to reduce friction?
a. Wear batting gloves to bat.
b. Press harder while sanding wood.
c. Push harder when cleaning.
d. Wax skis before skiing down a slope.
Read the description. Then, draw a line from the dot next to each question to the matching
word.
6. a force that holds objects to
Earth’s surface
•
7. the combination of all forces
acting on an object
•
8. a combined force that causes
something to move
•
9. a combined force that does not
cause movement
a. balanced force
b. unbalanced force
•
10. what changes when
gravitational force changes
•
11. the amount of matter in an
object
•
12. your mass if you move to
Jupiter
•
13. your weight if you move to
Jupiter
•
c. gravity
d. net force
e. mass
f. weight
g. changed
h. unchanged
Read the words in the box. Read the sentences. Fill in each blank with the word that best
completes the sentence.
increasing
accelerating
Newton
Force
kilogram
Gravity
Friction
14. Your speed is not changing, but your direction is changing. You are still
______________________.
15. If a driver’s acceleration is positive, then the driver’s velocity is ______________________.
16. A change in motion is caused by a(n) ______________________.
17. The SI unit for force is a(n) ______________________.
18. The force that pulls everything toward Earth’s center is Earth’s ______________________.
19. A unit of mass is a(n) ______________________.
20. A force that opposes motion between two surfaces is ______________________.
Use the figures below to answer questions 21 through 23. Circle the letter of the best answer.
21. Look at Figure A. Why does the block not move?
a. no force applied
b. frictional force
c. surface friction
d. kinetic friction
22. Look at Figure B. What force keeps the block in place?
a. gravitational force
b. a magnetic force
c. no force applied
d. static friction
23. Look at Figure C. The block is moving. What force acts against the movement of the block?
a. static friction
b. kinetic friction
c. a magnetic force
d. gravitational force
Forces and Motion
Use the terms from the following list to complete the sentences below. Each term may be
used only once. Some terms may not be used.
momentum
mass
inertia
air resistance
free fall
centripetal force
projectile motion
acceleration
terminal velocity
1. When air resistance exactly matches the downward force of gravity, a falling object stops accelerating and reaches ______________________.
2. An object at rest tends to remain at rest. This property is called ______________________.
3. Only in a vacuum or in space can an object be in ______________________.
4. A car accelerating from 60 km/h to a constant speed of 80 km/h has increased its
______________________.
5. The horizontal movement given to an arrow by a bow is one component of
______________________.
Write the letter of the correct answer in the space provided.
_____ 6. If three balls of steel, rubber, and plastic were dropped at the same time from the same
height, which would hit the ground first? (Assume there is no air resistance.)
a. All would hit at the same time.
b. The rubber ball would hit first.
c. The steel ball would hit first.
d. The plastic ball would hit first.
_____ 7. A spacecraft orbiting Earth is both moving forward and
a. at terminal velocity.
b. in free fall.
c. experiencing resistance.
d. weightless.
_____ 8. Assuming 1 kg = 1,000 g, a 5 kg object has less inertia than an object with a mass of
a. 4 kg.
c. 2 kg.
b. 6,000 g.
d. 1,500 g.
_____ 9. Newton’s first law of motion states that a moving object, unless it is acted on by an unbalanced force, will
a. remain in motion.
b. eventually come to a stop.
c. change its momentum.
d. accelerate.
_____ 10. An astronaut uses a jet of nitrogen to maneuver in space. This can be done because of
a. orbiting.
c. momentum conservation.
b. free fall.
d. inertia.
_____ 11. A book weighs 6.0 N. If the acceleration of gravity is 9.8 m/s2 , what is the mass of the
book in kilograms?
a. 6.1 kg
c. 1.6 kg
b. 59 kg
d. 0.61 kg
12. You are a passenger in a car that is moving rapidly down a straight road. As the driver makes a
sharp left turn, you are pressed against the right side of the car. Explain why this happens.
13. Use Newton’s third law to explain how a person hammering a nail into a block of wood is
demonstrating conservation of momentum.
14. Why would a feather dropped from the same height as an acorn fall to Earth more slowly than
the acorn?
15. Imagine that you are throwing a snowball. The snowball moves away from you at a velocity of 2
m/s. What type of motion does the snowball exhibit? Explain your answer.
16. How does free fall in an orbiting spacecraft cause the appearance of weightlessness?
17. How can a sky diver benefit from air resistance?
18. A 0.151 kg baseball is pitched with a velocity of 43.1 m/s. Ignoring air resistance, what is the
baseball’s momentum after being pitched? Show your work
19. Use Newton’s laws of motion to explain why it is difficult to observe the effects of a reaction
force on falling objects. Provide an example to explain your answer.
20. Use the following terms to complete the concept map below.
direction
terminal velocity
air resistance
mass
weight
Semana 2
Interactions of Living Things
Circle the letter of the best answer for each question.
1. Rocks, temperature, and water are what kind of things?
a. biotic
b. abiotic
c. population
d. living
2.level of organization comes after population?
a. biosphere
b. organism
c. community
d. ecosystem
3.word describes a community of organisms and their environment?
a. individuals
b. ecosystem
c. population
d. community
4.living things make food from sunlight?
a. consumers
b. parasites
c. decomposers
d. producers
5.happened to other living things when the wolves no longer lived in Yellowstone?
a. They were better off.
b. They were out of balance.
c. They died.
d. They were not changed.
6.is food a limiting factor?
a. when a population is large
b. when there’s too much food
c. when a population is small
d. when there’s too much water
7.is an animal that catches and eats another animal called?
a. prey
b. predator
c. producer
d. herbivore
8.which relationship do living things help each other?
a. parasitism
b. mutualism
c. organism
d. predator
Read the description. Then, draw a line from the dot next to each description to the matching
word.
9. a bear that eats plants and animals
10. a triangle-shaped diagram that
shows how energy is lost
•
a. energy pyramid
•
b. omnivore
11. a type of symbiosis where the host
is harmed
12. the area from the oceans to the air
where there is life
•
c. biosphere
d. parasitism
•
Read the words in the box. Read the sentences. Fill in each blank with the word or phrase
that best completes the sentence.
food chain
13.
14.
15.
16.
food wed
producers
omnivores
food web shows energy connections better than a(n) ______________________.
that eat plants or animals are ______________________.
things that make their own food from sunlight are ______________________.
diagram showing the feeding relationships between living things in an ecosystem is
a(n)______________________.
population
biotic
abiotic
community
17. A
river
carrying nutrients is a(n) ______________________factor that helps the ecosystem.
18. Plants, animals, and all living things are ______________________factors.
19. Two or more individuals of the same kind living together are a(n) ______________________.
20. All the populations of living things in the same place are a(n) ______________________.
Interactions of Living Things
Use the terms from the following list to complete the sentences below. Each term may be
used only once. Some terms may not be used.
community
prey
biosphere
ecology
predator
symbiosis
coevolution
commensalism
1. Populations of organisms that live in and interact in a particular area form a(n)
___________________________.
2. The study of interactions between living things and their environment is
______________________.
3. A spider that feeds on live insects is an example of a(n) .______________________.
4. The part of Earth where life exists is the ______________________.
5. When the close interaction between two organisms results in long-term changes in both organ-
isms,______________________ has taken place
Write the letter of the correct answer in the space provided.
_____ 6. The plants a ladybug lives on, the aphids the ladybug eats, and the birds that would eat
the ladybug are all
a. biotic elements of an ecosystem.
b. predators.
c. producers.
d. abiotic elements of an ecosystem.
_____ 7. Herbivores, carnivores, and omnivores are all
a. decomposers.
c. predators.
b. producers.
d. consumers.
_____ 8. Animals that eat a variety of meats, fruits, and vegetables are
a. producers.
c. omnivores.
b. carnivores.
d. herbivores.
_____ 9. A scientist studying the way egrets, herons, and crabs interact, who is not interested in
abiotic factors such as the rocks, water, and temperature, is studying what level of environmental
organization?
a. population
c. community
b. ecosystem
d. biosphere
10. What is the difference between a population and an ecosystem? Give an example of each.
11. Explain the difference between a food chain and a food web.
12. Certain ants take a sweet liquid called honeydew from tiny insects called aphids. In exchange
for the honeydew, the ants protect the aphids from predators. What kind of relationship is this?
Explain your answer.
13.
Your friend puts leftover food and yard scraps into a compost pile in the back yard in order
to turn them into soil for plants. Over time, she notices that the compost pile has fungi growing on it.
What effect will it have on the compost pile?
14. Discuss three adaptations that predators or prey have developed to make their lives easier.
Choose one of the three that you think is most effective and explain why.
15. Coyotes are living near a populated area, and residents are afraid their dogs and cats will be
attacked. These residents want to kill the coyotes. Do you think this is a good idea? Why or why
not? Write about two possible effects. Can you think of a better way to deal with the problems
caused by the high coyote population? Explain.
16. Use the following terms to complete the concept map below.
carnivores
energy
herbivores
omnivores
producers
Semana 3
Cycles in Nature
Circle the letter of the best answer for each question.
1. What do all organic molecules contain?
a. oxygen
c. water
b. nitrogen
d. carbon
2. Why do living things need nitrogen?
a. to build new cells
b. to get rid of wastes
c. to cool them off
d. to carry nutrients
3. Where can primary succession begin?
a. in a place with only rocks
b. in a place with trees
c. in a place with crops
d. in a place with weeds
4. What plant will most likely grow first in secondary succession?
a. pine tree
b. lichen
c. crab grass
d. hardwood tree
5. Which of these might be a climax species?
a. the first species in an area
b. the first insects to eat lichens
c. the most common weeds in a farm field
d. the oldest trees in a forest
Read the description. Then, draw a line from the dot next to each description to the matching
word.
6. Bacteria in soil change nitrogen gas
into other forms.
•
7. Carbon moves between the
environment and living things.
•
8. Nitrogen moves between the
environment and living things.
•
9. Plants use carbon dioxide to make
sugars.
•
a. photosynthesis
b. nitrogen fixation
c. carbon cycle
d. nitrogen cycle
10. A substance burns.
•
11. Plants release water vapor.
•
a. respiration
12. Organisms use oxygen and release
carbon dioxide.
•
b. transpiration
13. A substance is broken into simpler
molecules.
•
c. combustion
d. decomposition
Read the words in the box. Read the sentences. Fill in each blank with the word or phrase
that best completes the sentence.
14.
15.
16.
17.
18.
runoff
biodiversity
succession
groundwater
pioneer species
Precipitation that is stored in the ground is ___________________________.
The growing of a community over time is ___________________________.
The variety of species present in an area is called ______________________.
Precipitation that runs from land to rivers and lakes is ______________________.
The first living things to grow in an area are ________________________.
Read the description. Then, draw a line from the dot next to each description to the matching
letter on the picture.
19. precipitation
•
20. transpiration
•
21. evaporation
•
22. condensation
•
1. Explain why soil formation is always the first stage of primary succession. Does soil formation stop
when trees begin to grow? Why or why not?
2. Compare the water cycle with the carbon cycle. What do both have in common?
3. Describe the role of living things in the carbon cycle.
4. Describe the main difference between primary and secondary succession.
5. Describe how pioneer species prepare an area for other living things.
6. Is snow a part of the water cycle? Why or why not?
7. Can a single scientist observe all of the stages of secondary succession on an abandoned field?
Explain your answer.
8. Use the following terms to create a concept map: abandoned farmland, lichens, bare rock, soil
formation, horseweed, succession, forest fire, primary succession, secondary succession, pioneer
species.
9. Explain how living things would be affected if the water on our planet suddenly stopped
evaporating.
10. How would living things be affected if there were no decomposers to cycle carbon back to the
atmosphere?
11. Explain how living things would be affected if the bacteria responsible for nitrogen fixation were to
die.
12. Describe the role bacteria play in the nitrogen cycle.
13. Over time, increased levels of carbon dioxide may result in global warming. How might increased
global temperatures affect the water cycle?
14. In primary succession, how do lichens transform the rock into soil?
15. Explain how the following two statements are related. Bean and pea plants have nitrogen-fixing
bacteria in their roots. Beans are peas are high in protein.
16. A tornado cuts a 10 m strip through a field, blowing away all of the plants and soil in its path. What
kind of succession will likely occur on this site? Explain.
17. When someone manages a lawn by applying weed killer and planting one type of grass, what
process is the person trying to prevent? Explain.
18. Imagine that you have a dog infested with fleas and ticks. You take your dog to a veterinarian to
have these pests removed. Your dog comes back with no fleas and ticks, but a month later the
pests are back. Is this an example of succession? Explain.
19. If only bacteria can use nitrogen from the air, how do plants and animals take part in the nitrogen
cycle?
20. Explain the relationship between respiration and photosynthesis
Semana 4
Elements, Compounds, and Mixtures
Circle the letter of the best answer for each question.
1. What pure substance forms when two elements chemically combine?
a. an element
b. a compound
2.
3.
4.
5.
6.
7.
8.
c. a mixture
d. a solution
Why can salt dissolve in water?
a. Salt is the solvent.
b. Salt is a solution.
c. Salt is soluble.
d. Salt is an element.
What is it called when particles in substances separate and spread evenly?
a. insolubility
b. dissolving
c. concentration
d. suspension
How can a compound be broken down?
a. by physical changes
b. by chemical changes
c. by crushing
d. by cooling
What forms when particles of two or more substances are evenly mixed?
a. compound
b. suspension
c. solution
d. element
Which of the following is a chemical property?
a. density
b. reactivity with acid
c. boiling point
d. color
Which of the following statements about particles in both solutions and colloids is true?
a. Particles cannot scatter light.
b. Particles can settle out.
c. Particles are soluble.
d. Particles cannot be filtered.
Which of the following is NOT true of compounds?
a. They contain two or more elements.
b. They form after a physical change.
c. They have their own physical properties.
d. They do not form randomly.
Read the description. Then, draw a line from the dot next to each description to the matching
word.
9. gelatin
•
a. colloid
•
10. nugget of gold
b. solution
•
11. water
12. salt dissolved in water
13. a solid solution of metals or
nonmetals dissolved in metals
14. an element that shares metal
and nonmetal properties
c. element
•
d. compound
•
a. alloy
•
b. suspension
c. solvent
15. a mixture of large, dispersed
particles
•
16. the substance in which a solute
dissolves
•
d. metalloid
Read the words in the box. Read the sentences. Fill in each blank with the word or phrase
that best completes the sentence.
ratio
17.
18.
19.
20.
distillation
nonmetals
nitrogen
A mixture of liquids can be separated by ______________________.
Bacteria make compounds from ______________________in the air
All ______________________are poor conductors of heat and electric current.
Elements join in a specific mass ______________________to form a compound.
1. Which category of element would be the least appropriate choice for making a container that can be
dropped without shattering? Explain your answer.
2. What type of change is needed to break down a compound?
3. A jar contains samples of the elements carbon and oxygen. Does the jar contain a compound?
Explain.
4. Suggest a procedure to separate iron filings from sawdust. Explain why this procedure works.
5. Identify the solute and solvent in a solution made from 15 mL of oxygen and 5 mL of helium.
6. What are three differences between solutions and suspensions?
7. How are compounds and elements alike? How do they differ?
8. How do the properties of sodium chloride compare with the properties of sodium and of chlorine?
9. When solid iodine is dissolved in alcohol, which is the solute? Which is the solvent?
10. Why might a lake in a tropical area contain more dissolved minerals than a lake in Maine?
11. When nail polish is dissolved in acetone, which substance is the solute and which is the solvent?
12. A light green powder is heated in a test tube. A gas is given off, while the solid becomes black. In
which classification of matter does the green powder belong? Explain your reasoning.
13. Why is it desirable to know the exact concentration of solutions rather than whether they are
concentrated or dilute?
14. Explain the three properties of mixtures using a fruit salad as an example.
15. To keep the “fizz” in carbonated beverages after they have been opened, should you store them in
a refrigerator or in a cabinet? Explain.