Physical Science (1&2)

Horatio was sitting by a campfire watching the logs burn. Which of the following is true?

• The ashes left by the logs are going to be made into new logs.

• The fire produces physical changes into the logs.

• The ashes left behind are a new substance.

• The fire produces no change in the logs.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Debbie is learning about weather. She wonders how temperature affects the rate of evaporation. She conducts an experiment to find out by placing equal amounts of water in identical dishes. She places one dish near a sunny window and the other on a table in a windowless, air-conditioned room. In three days, she returns to check the dishes. What will she find?

• The two dishes contain the same amount of water.

• The dish near the window contains less water than the dish in the windowless room.

• Both dishes contain more water than they did three days ago.

• The water in the dish in the windowless room has completely evaporated.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Bela is picking tomatoes from her garden. She finds a tomato on the ground that is soft and runny. Which claim is the best supported by the evidence?

• The tomato is decomposing (rotting), which is a chemical change.

• The tomato moved, which is a chemical change.

• The tomato ignited like a firecracker, which is a chemical change.

• The tomato deflated like a flat tire, which is a physical change.

Tags

NGSS.MS-PS1-2

Why does milk have to be refrigerated?

• Milk tastes better when it is cold.

• The reactions that cause milk to spoil are slower at a lower temperature.

• Physical changes that cause milk to spoil are slower at a lower temperature.

• No chemical or physical changes can occur at cool temperatures.

Erin was asked to design an experiment that would give the evidence needed to support the hypothesis: "A 6 inch playground ball will bounce higher than a 3 inch playground ball, because it is bigger." Which of the following statements would not be a part of Erin's experiment?

• Determining all of the variables.

• Repeating her experiment 5 times.

• Recording her results as well as her observations.

• Dropping the balls from different heights.

Tags

NGSS.MS-PS2-2

Which of the following can be removed from a mixture using a magnet?

• Cooking oil

• Iron filings

• Salt

• Sand

Tags

NGSS.MS-PS1-2

Which combination of substances from the chart above would dissolve in water?

• Sand and salt

• Cooking oil and sugar

• Sugar and iron filings

• Sugar and salt

Tags

NGSS.MS-PS1-2

Mr. Jones is looking for seashells hidden in the sand on the beach. How could he quickly separate any seashells from the sand?

• He could pour the sand through a sieve.

• He could dissolve the sand in the salt water.

• He could dissolve the sand in the fresh water.

• He could pass a magnet over the surface of the sand.

Ming wants to dissolve 10 grams of salt in water. Which of the following will make the salt dissolve fastest?

• Using cold water and stirring the mixture

• Using hot water without stirring the mixture

• Using hot water and stirring the mixture

• Using cold water without stirring the mixture

Tags

NGSS.MS-PS1-4

Sofia is timing how long it takes to dissolve two 10-gm samples of sea salt. One sample is finely ground into thousands of tiny grains of salt. The other is a single block of salt crystals. Sofia is dissolving each sample in a separate but identical glass of water. Why is this considered an experiment?

• Sofia has a variable

• Sofia didn't measure the amount of salt

• Sofia didn't measure the water in each glass

• Sofia isn't controlling anything

Tags

NGSS.MS-PS1-2