Mystery Science Web of Life 2

What did Zane do to test his idea about how plants grow bigger and heavier?

• He put a plant in a pot with soil, recorded the weights, added water, and checked the weights again after a few weeks.

• He planted seeds in the ground and watched them grow.

• He watered the plant every day and measured the leaves.

• He put the plant in sunlight and measured its height every day.

Answer explanation

Zane tested his idea by putting a plant in a pot with soil, recording its weight, adding water, and checking the weight again after a few weeks. This method allowed him to measure the impact of water on plant growth.

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

According to Zane’s experiment, what happened to the weight of the plant from Week 1 to Week 3?

• The plant weighed the same at the start and end.

• The plant weighed less at the end.

• The plant weighed more at the end.

• The plant disappeared at the end.

Answer explanation

Zane’s experiment showed that the plant's weight increased from Week 1 to Week 3, indicating it grew during that time. Therefore, the correct answer is that the plant weighed more at the end.

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NGSS.MS-LS1-5

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What happened to the weight of the soil from Week 1 to Week 3 in Zane’s experiment?

• The soil weighed less at the end.

• The soil weighed more at the end.

• The soil weighed the same at the start and end.

• The soil disappeared at the end.

Answer explanation

In Zane's experiment, the weight of the soil remained unchanged from Week 1 to Week 3, indicating that no soil was lost or gained during the experiment. Therefore, the correct answer is that the soil weighed the same at the start and end.

Based on Zane’s experiment, which statement is true about how plants grow bigger and heavier?

• Plants use material from the soil to grow bigger and heavier.

• Plants do not use material from the soil to grow bigger and heavier.

• Plants use material from the air to grow bigger and heavier.

• Plants do not use material from the air to grow bigger and heavier.

Answer explanation

Zane's experiment shows that plants grow bigger and heavier by using carbon dioxide from the air during photosynthesis, not by using material from the soil. Thus, the correct statement is that plants use material from the air.

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NGSS.5-LS1-1

Why did Zane add water to the soil during his experiment?

• To help the plant grow.

• To make the soil heavier.

• To see if the plant would float.

• To change the color of the plant.

Answer explanation

Zane added water to the soil to help the plant grow, as water is essential for plant health and development. The other options do not relate to the primary purpose of watering a plant.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What did Zane use to test if air has weight?

• A thermometer and a plant

• A balance scale with balloons, one side inflated and one side deflated

• A ruler and a leaf

• A glass of water and a seed

Answer explanation

Zane used a balance scale with balloons to demonstrate that air has weight. The inflated balloon has more air and thus more weight than the deflated one, showing the presence of weight in air.

What did Zane’s experiment show about air?

• Air has no weight at all

• Air has weight and can contribute to the weight of a tree

• Air is only needed for animals

• Air makes plants grow faster

Answer explanation

Zane’s experiment demonstrated that air has weight, which can be measured. This weight contributes to the overall mass of objects like trees, supporting the correct answer that air has weight and can contribute to the weight of a tree.

Which of the following statements is TRUE based on Zane’s experiment?

• The experiment shows that air is needed for a plant to be healthy

• The experiment shows that air has weight

• The experiment shows how water helps plants grow

• The experiment shows that soil is the heaviest part of a plant

Answer explanation

The correct statement is that the experiment shows air has weight. This is evidenced by the way air can exert pressure and affect the weight of objects, which is a key finding in Zane's experiment.

Tags

NGSS.5-LS1-1

Why did the side of the balance scale with inflated balloons pull down?

• Because the balloons were bigger

• Because the air inside the balloons has weight

• Because the deflated balloons were lighter

• Because the scale was broken

Answer explanation

The side of the balance scale with inflated balloons pulled down because the air inside the balloons has weight. This added weight makes that side heavier compared to the other side.

Using evidence from Zane’s experiment, explain if you agree or disagree with the idea that plants mostly use materials from the air for their growth.

• Agree, because the experiment shows air has weight and can add to a plant’s weight

• Disagree, because the experiment shows only water is important

• Disagree, because the experiment shows only soil is important

• Agree, because the experiment shows plants do not need air

Answer explanation

Agree, because Zane's experiment demonstrates that air contributes to a plant's weight, indicating that plants utilize materials from the air for their growth.

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