Science Leap Review

Which of these is an example of a physical adaptation?

• A bear hibernates during the winter.

• An elephant uses his trunk to get Water.

• Ducks Migrate South during the winter to stay warm

• A bunny's ears are large to help hear predators from far distances.

Tags

NGSS.MS-LS4-2

Coach Vance coaches the 5th grade soccer team at Caddo Lake Elementary. He asks two students to help him prepare for practice and inflate the soccer ball to at least 420 grams but no more than 450 grams. The two students measure the mass of the ball when it was deflated and when it was inflated. Part B: Which of the following best describes the particles of matter in the inflated soccer ball?

• The soccer ball changes shape and the different shape causes the ball to have more mass.

• The outside of the soccer ball is thicker, has more mass, and is made of solid particles.

• The air that is added to the soccer ball is made of unseen particles that move and fill the space inside of the soccer ball. This causes the soccer ball to have more mass.

• The air that is added to the soccer ball is made of unseen particles that become very large and remain in a fixed position. This causes the soccer ball to have more mass.

Tags

NGSS.MS-PS1-2

Question 4: Burning Wood

A chemistry class burned wood in a fume hood in their science laboratory to better understand how the materials would change when burned. Before conducting the experiment, the students measured the mass of the wood in the fume hood. After the experiment, the students measured the mass of the burned wood, the ashes, and the gases in the fume hood.

Which graph best represents the mass of all of the materials before and after burning?

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Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In science class, Marvin studies the effects of mixing substances together. Marvin and his partner measure and collect 450 mL of warm water and 50 mL of salt in a large, glass beaker. They measure the mass of each substance and record the results in the table below. Which statement best explains Part A?

• The water was warm and made some of the salt dissolve. When salt dissolves, it loses its mass.

• Marvin and his partner mixed the water and the salt. This made the mass of both substances double.

• The water was warm and made some of the salt dissolve. Both substances lost a little mass because they were mixed together.

• Marvin and his partner combined the water and the salt. The total mass of each substance did not change even though they were mixed together.

Tags

NGSS.MS-PS1-5

Lamar is studying water quality in his science class. He learns that salt water is seeping into his neighboring town’s water supply and makes the water dangerous to drink. Lamar’s teacher challenges his class to investigate ways to identify salt water without tasting it. Part A: Lamar has one glass of pure water and one glass of salt and water. The two liquids look exactly alike. What investigation can Lamar perform, without tasting the water, to find out which glass contains the salt water?

• Lamar couldn’t do it. A chemical change has taken place.

• Lamar could evaporate the water to see which cup leaves salt behind.

• Lamar couldn’t do it. It is not possible to identify clear liquids without tasting them.

• Lamar could shine a light into the water and check for salt conductivity.

Tags

NGSS.MS-PS1-2

Lamar is studying water quality in his science class. He learns that salt water is seeping into his neighboring town’s water supply and makes the water dangerous to drink. Lamar’s teacher challenges his class to investigate ways to identify salt water without tasting it. Part B: What measurements can Lamar take before he conducts his investigation in Part A to provide evidence of which cup contained the salt water?

• Find the volume of both liquids to see which one took up the most space.

• Measure the temperature of each liquid to provide evidence that a chemical change had taken place.

• Measure the mass of each cup to see which one had the most matter.

• Use a photometer to observe which cup had the most salt conductivity.

Tags

NGSS.MS-PS1-2

Dr. Hoey develops an experiment to investigate how different substances react when they are mixed with water. Before mixing the materials together, she measured the mass and temperature of the substances. During the experiment, Dr. Hoey mixes calcium and water in a glass with a plastic rod. Then, she mixes baking soda and water in a glass with a plastic rod. The results of the experiment are below. Which of the following claims can Dr. Hoey make based on her investigation?

• Solution A is a new substance because after the calcium and water mixed, the temperature increased and the color changed.

• Solution B is a new substance because after the baking soda and water mixed, the solution was cloudy and the temperature remained the same.

• Solution B is a new substance because after the baking soda and water mixed, the mass of the solution is equal to the mass of the baking soda and water before they were mixed.

• Solution A and B are new substances because each solution stayed the same when they were mixed together.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following best describes the process of photosynthesis?

• Conversion of light energy into chemical energy by plants

• Breaking down of glucose to release energy

• Exchange of gases between plants and the atmosphere

• Absorption of nutrients from the soil

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the primary function of the mitochondria in cells?

• Photosynthesis

• Protein synthesis

• Energy production

• Cell division

Tags

NGSS.MS-LS1-2

A student conducts an experiment to test the effect of temperature on the solubility of sugar in water. Which variable should be kept constant?

• Amount of sugar

• Temperature of water

• Type of sugar

• Volume of water