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________ is anything that takes up space and has mass.
Matter
A common property of air and other gases is ______.
a. shape
b. composition
c size
d. mass
d. mass
The mass of any object or material is equal to the ____ of the mass of its parts.
a. quotient
b. sum
c. product
d. difference
b. sum
A _____ change is when substances with different properties form a new substance.
chemical
A ______ is a push or a pull on any object.
force
Which of the following is an example of increased friction?
a. Wind pushing against the tail of an airplane helps it fly faster
b. Rubber on the bottom of shoes helps keep a person from falling on slippery ground
c. Hot air blown into a balloon causing the balloon to go upward
d. Oil in a car's engine helps parts move against each other easily
b. Rubber on the bottom of shoes helps keep a person from falling on slippery ground
Why can your scooter roll faster on a wooden surface than on a sidewalk?
a. because there is less wind
b. because there is more friction
c. because there is less friction
d. because it is indoors
c. because there is less friction
When you throw a ball, what causes the downward motion of the ball?
gravity
Which of the following statements DOES NOT demonstrate how gravity pulls objects towards the Earth.
a. A skydiver jumps out of an airplane
b. A pencil rolls off the table and onto the floor
c. A man rides an escalator up to the main floor of a building
d. A boy throws a ball up in the air and watches it fall to the ground
c. A man rides an escalator up to the main floor of a building
What two factors are needed to measure speed?
Distance and time
A piece of paper is burned and turns to ash and gas. This chemical change is ________.
a. actually a physical change
b. difficult to reverse
c. only a mixture
d. easy to reverse
b. difficult to reverse
When shooting an arrow, why should you aim higher than the target you are trying to hit?
a. The air causes friction which pulls the arrow down.
b. Your bow does not have enough power.
c. Gravity pulls the arrow down as it flies.
d. The arrow is too heavy for the bow.
c. Gravity pulls the arrow down as it flies.
Gravity determines the __________.
a. color of matter
b. weight of matter
c. volume of matter
d. shape of matter
b. weight of matter
Which of the following statement will NOT cause a change in direction?
a. A bat hits a ball coming toward it.
b. A bowling ball is rolling down an alley.
c. A falling apple bounces off of the ground.
d. A rocket is blasted up into the sky.
b. A bowling ball is rolling down an alley.
When playing golf on a grassy surface, what effect does the grass have on the ball?
a. It slows the movement
b. It speeds up the movement
c. It makes the movement easier
d. It has no effect
a. It slows the movement.
What most affects a baseball's motion when it is hit by a batter?
a. the mass of the batter and how fast the ball is thrown
b. the mass of the baseball and how hard the batter hits it
c. the angle of the baseball and how hard the batter hits it
d. the mass of the batter and how high the ball is thrown
b. the mass of the baseball and how hard the batter hits it
An attraction between the mass of Earth and the mass of an object that pulls objects to Earth is _______.
a. mass
b. reaction
c. gravity
d. force
c. gravity
What type of change produces substances with different properties than the original substances?
Chemical change
When you slip on a wet floor, you slip because there is too little of which force?
a. lifting
b. friction
c. gravity
d. motion
b. friction
Suzie saw a lizard on the fence in her backyard one evening. The next morning, she knew the lizard had moved even though she did not see it move. How did she know it had moved?
a. The lizard was no longer on the fence
b. The lizard appeared hungry and thirsty
c. The lizard began moving when it saw Suzie
d. The lizard had been pushed or pulled by a force
a. The lizard was no longer on the fence
Why does applying wax to the bottom of skis help a skier go faster?
a. It helps the skier stand up on the skis
b. It increases the friction with the snow
c. It decreases the friction with the snow
d. It keeps the skis clean
C. It decreases the friction with the snow
Speed is the __________.
a. The change of motion during the time traveled
b. The time it takes to get somewhere
c. The distance traveled in a certain amount of time
d. The change of motion during the time traveled
Friction acts in the _______ direction of a moving object.
opposite
Ice melting is an example of a _________ change.
physical
When you lie on the ground, what force is causing you to feel held in place?
Gravity