Matter
A gust of wind blows a piece of paper across the ground. Which statement BEST explains why the paper moves?
A. The paper is heavier than air and sinks to the ground as the wind blows.
B. Warm air heats the paper and makes it less dense.
C. The wind causes particles of paper to evaporate, making the paper lighter.
D. Moving particles of air hit the paper and push it across the ground.
D. Moving particles of air hit the paper and push it across the ground.
A student writes four lists and challenges a friend to identify the list that BEST describes salt. Which list should the friend choose?
A. White, solid, insoluble in water
B. White, solid, soluble in water
C. Brown, solid, insoluble in water
D. Clear, liquid, soluble in water
B. White, solid, soluble in water
A runner mixes energy drink powder into a glass of water. After taking a sip, the runner thinks the drinks is too strong.
What can the runner do to make the taste less strong?
A. Remove some of the powder from the mixture.
B. Add more water to the mixture.
C. Add more powder to the mixture.
D. Pour out some of the mixture.
B. Add more water to the mixture.
A baseball is thrown toward a player holding a baseball bat. The player swings the bat and hits the ball as shown. *8
The baseball then moves away from the bat because energy is transferred --
A. from the ball to the air
B. from the bat to the ball
C. from the ball to the bat
D. from the air to the ball
B. from the bat to the ball
What has hands but cannot clap?
Students measure how long it takes for a ball to fall. First they drop the ball 6 meters from the top of a stairwell to the floor below. Then they drop the ball from the surface of the water to the bottom of a swimming pool that is 6 meters deep. The time it takes for the ball to fall is shown in the table.
Time for Ball to Fall
Through Air - 1.1 seconds
Through Water - 2.4 seconds
Why does it take the ball longer to fall through water than through air?
A. The mass of water is greater than the mass of air.
B. The water is colder than the air.
C. The particles in water are closer together than the particles in air.
D. The particles in water are stickier than the particles in air.
C. The particles in water are closer together than the particles in air.
A student fills two cups with water and adds salt to one of the cups. The salt dissolves in the water. Then the student places identical blocks of wood in each cup. The block in the salt water floats, but the block in the pure water sinks.
Based on these observations, which statement correctly describes the density of the wood blocks?
A. The blocks are more dense than the pure water but less dense than the salt water.
B. The blocks are less dense than the pure water but more dense than the salt water.
C. The blocks are less dense than the pure water and the salt water.
D. The blocks are more dense than the pure water and the salt water.
A. The blocks are more dense than the pure water but less dense than the salt water.
Lemonade contains water, lemon juice, and sugar. A student poured a glass of lemonade, tasted it, and then added a spoonful of sugar and stirred.
Which of the following MOST LIKELY occurred when the sugar was added?
A. The sugar sank to the bottom of the lemonade.
B. The taste of the lemonade became sweeter.
C. The color of the lemonade became darker.
D. The water and the lemon juice separated into two layers.
B. The taste of the lemonade became sweeter.
A golf club hits a gold ball. The ball starts moving away from the club, in the same direction that the club is moving. *t10
Which statement correctly describes the force of the golf club acting on the ball?
A. It is a push that acts on the ball at a distance.
B. It is a pull that acts on the ball when the golf club touches the ball.
C. It is a pull that acts on the ball at a distance.
D. It is a push that acts on the ball when the golf club touches the ball.
D. It is a push that acts on the ball when the golf club touches the ball.
What has four legs but cannot walk?
What is a chair?
Ice is placed in a glass of room-temperature water. After a few minutes, the ice begins to melt and there are droplets of water on the outside of the glass.
Which BEST explains these changes?
A. The water in the glass became colder, cooling the glass and causing the water vapor in the air to condense on the outside of the glass.
B. As the ice melted, it became liquid water and moved to the outside of the glass.
C. The water in the glass became warmer and condensed on the outside of the glass.
D. The ice evaporated and condensed on the outside of the glass.
A. The water in the glass became colder, cooling the glass and causing the water vapor in the air to condense on the outside of the glass.
A student added powdered drink mix to a mug of hot water and stirred until the powder disappeared. Which statement BEST explains why the powder was not visible?
A. The drink powder settled at the bottom because it had a greater density than water.
B. The drink powder dissolved because it was soluble in water.
C. The drink powder was hard to see because it has a smaller volume than the water.
D. The drink powder melted and became a liquid.
B. The drink powder dissolved because it was soluble in water.
A student puts 125 milliliters of cold water in a beaker, adds 15 grams of sugar, and measures the mass of the mixture in the beaker. Then the student heats the beaker on a hot plate, stirring the mixture constantly until it reaches approximately 45 degrees celsius. Finally, the student measures the mass again.
What does the student MOST LIKELY observe?
A. The sugar disappears, and the mass of the mixture does not change.
B. The sugar disappears, but the mass of the mixture does not change.
C. The sugar sinks to the bottom of the beaker, and the mass of the mixture increases.
D. The sugar floats to the surface of the water, and the mass of the mixture does not change.
B. The sugar disappears, but the mass of the mixture does not change.
A student carries books in a backpack. A hole forms in the bottom of the backpack, and the books start to fall through the hole toward the ground.
Which sentence correctly explains why the books start to fall?
A. The force of the backpack on the backpack on the books becomes weaker.
B. The force of the backpacks on the books changes direction.
C. The force of gravity on the books changes direction.
D. The force of gravity on the books becomes stronger.
A. The force of the backpack on the backpack on the books becomes weaker.
What bats, but never hits; is near a ball, but never thrown?
What is eyelashes?
A chef melts some butter in a skillet and places the skillet on a cool countertop. When the chef looks at the pan 30 minutes later, the butter --
A. has evaporated
B. is still liquid
C. is still bubbling
D. is almost solid
D. is almost solid
Some iron beads were poured into a bowl of plastic beads. *
Which property could NOT be used to separate the beads?
A. color
B. Magnetism
C. Solubility
D. Density
C. Solubility
A group of students is given two tools to separate mixtures. *
Which mixture can be separated with these tools?
A. Olive oil, salt, and sugar
B. Grapes, sugar, and water
C. Strawberries, grapes, and blueberries
D. Grapes, salt, and olive oil
D. Grapes, salt, and olive oil
Two students in different rooms on either side of a wooden door. One student produces a sound by tapping a finger on the door. The other student places one ear against the door and hears the sound of the tapping. *9
Which statement correctly describes how sound energy moves through the door?
A. Electric charges transfer the energy by flowing through the door.
B. Chemical energy stored in the door transforms into sound.
C. Particles of the wood transform the energy into heat that can pass through the door.
D. Waves transfer the energy through vibrating particles of the door.
D. Waves transfer the energy through vibrating particles of the door.
You can find this in Earth, Jupiter, Mercury, and Mars, but not in Venus or Neptune. What is it?
What is the letter R?
A candle maker pours liquid wax into a mold to make candles shaped like houses.
How are heating and cooling involved in making these candles?
A. Wax must be kept cool throughout the candle-making process.
B. Wax must be kept warm throughout the candle-making process.
C. Wax must be cooled before it is poured in the mold, and heated when it is removed from the mold.
D. Wax must be heated before it poured into the mold, and cooled before it is removed from the mold.
D. Wax must be heated before it poured into the mold, and cooled before it is removed from the mold.
Two friends walk on the beach with their shoes on. When they take their shoes off, the hot sand burns the bottom of their feet. Which of the following does NOT explain this experience.
A. Their shoes are good thermal insulators.
B. Heat is conducted from the sand to their feet.
C. The sand absorbed heat from the sun and became hot.
D. The bottoms of their shoes are good thermal conductors.
D. The bottoms of their shoes are good thermal conductors.
Some white glass marbles and iron bearings are mixed together in a jar. The marbles and the ball bearings are the same size. *
Which methods could be used to separate the marbles from the ball bearings? Select THREE correct answers.
A. Weigh each object and use hands to sort them by weight.
B. Use a magnet to pull out the ball bearings.
C. Look at the objects and use a spoon to sort them by color.
D. Put the objects in a bowl of water, then remove the ones that float.
E. Pour the mixture through a mesh screen.
A. Weigh each object and use hands to sort them by weight.
B. Use a magnet to pull out the ball bearings.
C. Look at the objects and use a spoon to sort them by color.
A teacher asks four students to move a large table to the right side of the classroom. *t11
If each student applies the same force, which combination of the pushes and pulls will result in a move straight to the right?
A. Students 2 and 3 pull
B. Student 1 pushes, and Student 3 pulls.
C. Students 1 and 4 push.
D. Student 1 pulls, and Student 3 pushes.
B. Student 1 pushes, and Student 3 pulls.
We sing while it lives. We clap when it dies. What is it?
What is a birthday candle?