Grade 10 Science Worksheet: Plants (Homework Practice)

Plants Homework Practice

Grade 10 Science Plants Homework Practice Challenging 20 Questions 12 Views

Classroom Worksheet

Grade 10 Science Worksheet: Plants (Homework Practice)

Plants Homework Practice

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Grade: Grade 10

Subject: Science

Topic: Plants

Time: 20 Minutes

Difficulty: Challenging

Questions: 20

Instructions:
Answer all 20 questions. Show your work where needed. Write complete sentences for short-answer responses. Use scientific vocabulary accurately.

Skills Practiced:

Plants
Science
Critical Thinking
Problem Solving

1Question

List the three main functions of roots in most plants.

2Question

What is the main function of the stem in a plant?

3Question

Name the two main types of vascular tissue in plants and state what each transports.

4Question

What is photosynthesis?

5Question

Where in the leaf does most photosynthesis occur, and why is this location important?

6Question

Explain the role of stomata in plant survival.

7Question

Why do plants need both xylem and phloem?

8Question

Describe one adaptation of roots that helps them absorb water efficiently.

9Question

A plant is placed in a dark cupboard for several days. Predict one change you might observe and explain why.

10Question

What is transpiration?

11Question

How does transpiration help move water from the roots to the leaves?

12Question

Compare the structure of a leaf adapted for high light conditions with one adapted for low light conditions. Give one difference.

13Question

Explain why the waxy cuticle is important for terrestrial plants.

14Question

What is the purpose of chlorophyll in plant cells?

15Question

A farmer notices that a crop plant has yellow leaves and slow growth. Suggest one possible nutrient deficiency and explain the effect.

16Question

Why are minerals, such as magnesium and nitrogen, important to plants?

17Question

Describe how a plant responds to light over time. Name this response.

18Question

Explain how guard cells help regulate water loss and gas exchange.

19Question

A plant in a greenhouse has access to water, light, and carbon dioxide, but its growth is still limited. Name one other factor that could limit growth and explain why.

20Question

Design an experiment to test how light intensity affects photosynthesis in a pond plant. Include the independent variable, dependent variable, and one control variable.

Answer Key

#	Answer
1	Anchorage, absorption of water and minerals, and storage of food in some plants.
2	The stem supports the plant and transports water, minerals, and sugars between roots and leaves.
3	Xylem transports water and minerals; phloem transports sugars (food made in photosynthesis).
4	Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to make glucose and oxygen.
5	Most photosynthesis occurs in the mesophyll, especially the palisade mesophyll, because these cells contain many chloroplasts to capture light.
6	Stomata are openings that allow gas exchange: carbon dioxide enters for photosynthesis, and oxygen and water vapor leave the leaf.
7	Plants need xylem to move water and minerals from the roots upward and phloem to move sugars from the leaves to other parts of the plant.
8	Root hairs increase surface area, allowing the plant to absorb more water and minerals from the soil.
9	The plant may become pale or weak because it cannot photosynthesize without light, so it cannot make enough glucose for growth and energy.
10	Transpiration is the loss of water vapor from a plant, mainly through the stomata in the leaves.
11	Transpiration creates a pull as water evaporates from the leaves, drawing water upward through the xylem in a continuous column.
12	A high-light leaf often has a thicker cuticle and more palisade cells; a low-light leaf is usually thinner and may have a larger surface area to capture more light.
13	The waxy cuticle reduces water loss by evaporation from the leaf surface, helping the plant conserve water on land.
14	Chlorophyll absorbs light energy, mainly red and blue light, to power photosynthesis.
15	A nitrogen deficiency is one possible cause. Nitrogen is needed to make proteins and chlorophyll, so a deficiency can lead to yellow leaves and reduced growth.
16	Minerals are needed to make essential molecules such as chlorophyll, proteins, and enzymes that support growth and metabolism.
17	A plant bends or grows toward light; this response is called phototropism.
18	Guard cells open and close stomata. When open, gases can exchange; when closed, water loss is reduced, helping the plant conserve water.
19	One other factor could be mineral availability, such as nitrogen or potassium. Without enough minerals, the plant cannot make important molecules needed for healthy growth.
20	Example: Place a pond plant at different distances from a lamp. Independent variable: light intensity or distance from the lamp. Dependent variable: rate of photosynthesis, measured by oxygen bubbles produced per minute. One control variable: temperature, which should be kept constant.