Physical Science
A puddle of water disappears after some time in the Sun. This scenario describes
A. an irreversible change
B. a change from a solid to a liquid
C. a change in which heat is removed
D. change from one type of matter to another
D. change from one type of matter to another
A ________ is any organism that can make its own food.
A. consumer
B. decomposer
C. apex predator
D. producer
D. producer
All of the following are observable patterns created by the system containing the Sun, Earth,
and Moon except for
A. day and night
B. eclipse
C. seasons
D. orbits
D. orbits
Engineers use a design process to invent or improve machines. What is the first step in this design process?
A. Make a prototype of the design.
B. Identify a need or problem to be solved.
C. Make a graph to show how well the design worked.
D. Keep notes and drawings of the design throughout the process.
B. Identify a need or problem to be solved.
The process of obtaining information by using your senses is called..
A. an observation
B. A scientific method
C. an inquiry
D. a conclusion
A. an observation
Physical changes to matter affect the physical properties like size, shape, and
physical state. Examples of physical changes include tearing, freezing, and
melting. These changes are usually reversible.
Chemical changes to matter affect the chemical properties. Examples of
chemical change include rusting, digesting, and rotting. These changes are not
reversible and involves the formation of new substance.
Which statement is true?
A. Ripping paper is a chemical change because the chemical structure of the
paper has changed.
B. Ripping paper is a physical change because a new substance forms.
C. Ripping paper is a chemical change because the change is not reversible.
D. Ripping paper is a physical change because the change only affects the size and shape, or its physical properties.
D. Ripping paper is a physical change because the change only affects the size and shape, or its physical properties.
Which of the following is NOT an advantage of hydroponic gardening?
A. Can be used in climates with unsuitable soil
B. Requires less water
C. More rapid growth due to more oxygen near roots
D. Faster spread of disease in the system
D. Faster spread of disease in the system
Which spheres are involved in this interaction?
Owls burrow into the soil for safety.
A. Hydrosphere and Atmosphere
B. Geosphere and Biosphere
C. Atmosphere and Geosphere
D. Biosphere and Hydrosphere
B. Geosphere and Biosphere
A student team designs a device to meet a human need. Then the students build a prototype. Which of these best describes the purpose of a prototype?
A. to develop ideas for a solution
B. to show how the design will look
C. to test the quality of the conclusion
D. to see whether it meets design criteria
D. to see whether it meets design criteria
Which is a statement of what you think will happen during an investigation?
A. hypothesis
B. Conclusion
C. evidence
D. criteria
A. hypothesis
Jim has a pitcher of water and adds a powder drink mix to make lemonade. What is this called?
A. Mixture
B. Compound
C. Combination
D. Solution
D. Solution
Martha learned that wolves and elk are a part of the same food chain.
Grass --> Elk--> Wolf
She wrote how matter is transferred in the ecosystem where the elk and wolves live. Not all her sentences contain true statements.
Write the letter of the 2 sentences that are false.
A. Matter moves from the grass to the elk and then to the wolf.
B. When these organisms die, microbes break down the matter in them and return it to the soil.
c. Animals such as elk and wolves take in matter from the environment as water and air.
D. Plants do not take in matter from the environment
E. Grass releases gases into the environment that the elk need to breathe.
F. The elk release gases that the wolves need to breathe.
G. Wolves release gases that plants need to live.
D. Plants do not take in matter from the environment
F. The elk release gases that the wolves need to breathe.
The list shows the distance of some stars from Earth.
-star A: 9.4 light-years
-star B: 4.2 light-years
-star C: 11.2 light-years
-star D: 0.000016 light-years
-star E: 6.7 light-years
How bright do these stars look to people on Earth? Number the stars in the correct order from 1 to 5 with the least bright star as 1 an the brightest star as 5.
1. Star C
2. Star A
3. Star E
4. Star B
5. Star D
Things that limit what you are trying to do such as money, materials, or time are known as ....
A. Criteria
B. Constraints
C. Problem
D. Prototype
B. Constraints
Which of these units would be best to use to measure the amount of water in a graduated cylinder?
A. Meters
B. Kilograms
C. Milliliters
D. Seconds
C. Milliliters
Marco is eating a bowl of Cheerios with milk. Did mixing the cereal with the milk make a new substance?
A. Yes, because the color of the milk changed.
B. Yes, because the sugar dissolved and the cereal got wet.
C. No, because mixing substances cannot make new substances.
D. No, because he can separate the cereal from the milk to get the original substances back.
D. No, because he can separate the cereal from the milk to get the original substances back.
What role do nonliving things play in an ecosystem?
a. They are food for the plants and animals.
b. They prevent competition among populations.
c. They determine which plants and animals can live there.
d. They help control the effect humans might have on an ecosystem.
c. They determine which plants and animals can live there.
Which list represents the correct organization of the biosphere from smallest to largest?
A. biosphere, biome, ecosystem, community, population, individual
B. biome, biosphere, community, ecosystem, individual, population
C. individual organism, population, community, ecosystem, biome, biosphere
D. population, individual, community, biome, ecosystem, biosphere
C. individual organism, population, community, ecosystem, biome, biosphere
Le designed a new kind of skateboards that anyone can use. He tested the skateboard with three different weights, 65, 80, 105 pounds. With a105 pounds on it, the center sagged to the ground. What should Le's next two steps be?
A. Test again
B. Add bigger wheels
C. Test it with smaller friends
D. Sell his new skateboard design
E. Build the board with stronger materials
A. Test again
E. Build the board with stronger materials
Will plants grow taller with different amounts of water?
What is the dependent variable?
A. height of the plants
B. amount of water
C. the color of the plants
D. the same type of plants
A. height of the plants
Ming wants to find out if air takes up space. Which experiment would best help her find this out?
A. Fill a cup with water. Fill another cup with air. Weigh both cups.
B. Weigh an empty metal container. Place a lid on it. Weigh it again.
C. Blow up a balloon. Tie a knot to make sure it is closed. Try to flatten the balloon.
C. Blow up a balloon. Tie a knot to make sure it is closed. Try to flatten the balloon.
Students are doing an investigation using an aquarium to see what would happen to the plants and animals in an ecosystem that did not get enough sunlight. They use the same type, number, and size of plants and fish in each tank. Each tank is given a different number of hours of sunlight each day. What should they measure?
a. the temperature of the water
b. the growth of plants and animals
c. how much food they feed the plants
d. how much water they put in the tank
b. the growth of plants and animals
Natural resources are materials that occur in nature which living things use. Trees,
wind, sunlight, and fossil fuels are natural resources. Natural resources can be
classified as renewable or nonrenewable.
Renewable resources can be replaced quickly or are always available. Trees,
wind, and sunlight are classified as renewable resources.
Nonrenewable resources cannot be replaced easily. Once they’re gone,
they’re gone. Fossil fuels, such as coal, oil, and natural gas, are classified as
nonrenewable resources.
Why are fossil fuels most likely considered nonrenewable resources?
A. They can be replaced quickly and easily.
B. They can be washed away in floods.
C. They take millions of years to form.
D. They can be grown again in a short period of time.
C. They take millions of years to form.
On her way to school everyday, Chrissy needs to cross a creek that is five feet wide. The solution to her problem must be safe and easy to use and she cannot ever get wet. She can use only a rope and some boards that are 10 feet long. She brainstorms four ides. Which idea meets all of her criteria and constraints?
A. She can build a sailboat.
B. She can swim across the creek.
C. She can tie the boards together to make a bridge.
D. She can tie the rope to a small tree branch and swing across.
C. She can tie the boards together to make a bridge.
Which paper towel is the strongest: Scott, Bounty or Viva? What is the independent variable?
A. The number of pieces of towels
B. The brand of paper towel
C. The controlled variable
D. The same size paper towel
B. The brand of paper towel