States of Matter
Which state of matter keeps its own shape?
A. Liquid
B. Gas
C. Solid
D. Plasma
C. Solid
When a solid melts, it becomes a:
A. Gas
B. Liquid
C. Solid
D. Plasma
B. Liquid
Which is a physical change?
A. Burning wood
B. Rusting metal
C. Cutting paper
D. Fireworks
C. Cutting paper
A chemical change makes:
A. A new substance
B. A shape change
C. Ice
D. Heat only
A. A new substance
A chemical reaction happens when:
A. Matter melts
B. Matter freezes
C. New substances form
D. Matter changes shape
C. New substances form
In which state do particles move freely and spread out?
A. Solid
B. Liquid
C. Gas
D. Ice
C. Gas
What is it called when liquid changes into gas?
A. Freezing
B. Condensation
C. Evaporation
D. Melting
C. Evaporation
During a physical change, a substance:
A. Becomes new
B. Changes shape or size
C. Explodes
D. Disappears
B. Changes shape or size
Which is a sign of a chemical change?
A. Cutting
B. Melting
C. Color change
D. Pouring
C. Color change
What do we call the starting substances?
A. Products
B. Reactants
C. Mixtures
D. States
B. Reactants
Why does a liquid change shape but keep the same volume?
A. Its particles are far apart
B. Its particles can slide past each other
C. Its particles do not move
D. Its particles disappear
B. Its particles can slide past each other
What change happens when gas turns into liquid?
A. Melting
B. Condensation
C. Sublimation
D. Freezing
B. Condensation
Why is melting ice a physical change?
A. It makes gas
B. No new substance forms
C. Heat is released
D. Bubbles appear
B. No new substance forms
Why is rusting a nail a chemical change?
A. It changes shape
B. A new substance forms
C. It melts
D. It freezes
B. A new substance forms
What shows a chemical reaction occurred?
A. Same properties
B. New properties
C. Same temperature
D. Same shape
B. New properties
A balloon changes shape when you squeeze it. What state of matter is inside?
A. Solid
B. Liquid
C. Gas
D. Ice
C. Gas
Which change is caused by cooling?
A. Melting
B. Evaporation
C. Condensation
D. Sublimation
C. Condensation
Which physical change can be reversed?
A. Burning paper
B. Rusting a nail
C. Dissolving sugar in water
D. Fireworks
C. Dissolving sugar in water
Why can most chemical changes NOT be undone?
A. They happen slowly
B. They make new substances
C. They change temperature
D. They involve water
B. They make new substances
Why does vinegar and baking soda bubbling show a reaction?
A. It melts
B. A gas forms
C. It freezes
D. It changes shape
B. A gas forms
A solid keeps its shape and volume even when moved. What explains this?
A. Particles move freely
B. Particles vibrate in place
C. Particles spread out
D. Particles change substance
B. Particles vibrate in place
A puddle disappears on a hot day. Which best explains what happened?
A. The water was destroyed
B. The water changed into gas
C. The water became a solid
D. A chemical reaction happened
B. The water changed into gas
A student freezes juice into a popsicle. Why is this not a chemical change?
A. It changes color
B. It can melt back into juice
C. It makes bubbles
D. It smells different
B. It can melt back into juice
A student sees bubbles, heat, and a new smell. What is the best conclusion?
A. Physical change
B. State change
C. Chemical change
D. Freezing
C. Chemical change
If products have different properties than reactants, what does that prove?
A. A state change happened
B. A physical change happened
C. A chemical reaction happened
D. Matter disappeared
C. A chemical reaction happened