Grade 10 STEM Worksheet: Plants — Challenge Practice

Plants Challenge Practice

Grade 10 STEM Plants Challenge Practice Medium 25 Questions 12 Views

Classroom Worksheet

Grade 10 STEM Worksheet: Plants — Challenge Practice

Plants Challenge Practice

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Grade: Grade 10

Subject: STEM

Topic: Plants

Time: 20 Minutes

Difficulty: Medium

Questions: 25

Instructions:
Read each question carefully and show your work when needed. Answer in complete sentences for written responses. Use scientific reasoning, and check units in calculation questions.

Skills Practiced:

Plants
STEM
Critical Thinking
Problem Solving

1Question

What is the main function of chlorophyll in a plant cell?

2Question

Name the part of a plant that anchors it in the soil and absorbs water.

3Question

Which tissue transports water from the roots to the rest of the plant?

4Question

Which plant structure is mainly responsible for gas exchange?

5Question

State one difference between a monocot and a dicot plant.

6Question

Why do most leaves have a broad, flat shape?

7Question

What is the process called when plants make their own food using sunlight, carbon dioxide, and water?

8Question

Write the basic word equation for photosynthesis.

9Question

A plant is kept in a dark room for several days. Predict one effect on the plant and explain why.

10Question

Why are root hair cells effective at absorbing water?

11Question

Explain why transpiration can help move water through a plant.

12Question

What role do guard cells play in a leaf?

13Question

A scientist measures that a plant loses more water on a hot, windy day than on a cool, still day. Why is this expected?

14Question

Why is magnesium important for healthy plant growth?

15Question

A plant receives blue light and red light but very little green light. Why does this make sense in terms of leaf color?

16Question

Describe one adaptation of desert plants that helps them conserve water.

17Question

A potted plant is placed near a window and begins bending toward the light. What is this response called?

18Question

Why do plants need both xylem and phloem?

19Question

If a leaf loses its waxy cuticle, what is one likely consequence?

20Question

Explain how soil quality can affect plant growth.

21Question

A plant has yellow leaves even though it receives enough sunlight. Give one possible scientific explanation.

22Question

A student measures the height of a plant every week and gets these values: Week 1 = 8 cm, Week 2 = 11 cm, Week 3 = 15 cm, Week 4 = 18 cm. What is the average weekly growth over the 4-week period?

23Question

A greenhouse is kept warm and humid. How might these conditions affect transpiration, and why?

24Question

How does the structure of a leaf help it carry out photosynthesis efficiently? Give two features and explain them.

25Question

Design a simple experiment to test whether light intensity affects the rate of photosynthesis in a plant. Include the independent variable, dependent variable, and one control variable.

Answer Key

#	Answer
1	Chlorophyll absorbs light energy for photosynthesis.
2	Roots
3	Xylem
4	Stomata
5	Monocots usually have one seed leaf, while dicots usually have two seed leaves.
6	A broad, flat shape increases surface area for capturing sunlight and exchanging gases.
7	Photosynthesis
8	Carbon dioxide + water + light energy → glucose + oxygen
9	The plant may become weak and pale because it cannot photosynthesize enough without light.
10	They have a large surface area, which helps them absorb more water efficiently.
11	Water evaporating from the leaves creates a pull that helps draw water upward through the xylem.
12	Guard cells open and close stomata to control gas exchange and water loss.
13	Heat and wind increase evaporation from the leaf surface, so transpiration increases.
14	Magnesium is needed to make chlorophyll, which is essential for photosynthesis.
15	Leaves appear green because they reflect more green light and absorb more red and blue light.
16	Desert plants may have thick waxy cuticles, small leaves, or spines to reduce water loss.
17	Phototropism
18	Xylem carries water and minerals, while phloem carries sugars made in photosynthesis.
19	The leaf will lose water more quickly.
20	Soil quality affects water availability, nutrient supply, and root support, all of which influence growth.
21	It may be lacking nutrients such as nitrogen or magnesium, which are needed for healthy leaf growth.
22	The plant grew 10 cm total over 3 weeks, so the average weekly growth was about 3.3 cm per week.
23	Transpiration would likely decrease because humid air reduces evaporation from the leaves.
24	Leaves are broad to capture more light, and they have many chloroplasts and stomata for photosynthesis and gas exchange.
25	Independent variable: light intensity. Dependent variable: rate of photosynthesis, such as oxygen bubble count or gas production. Control variable: keep the plant type, water, temperature, and carbon dioxide level the same.