Grade 7 Chemistry Review Worksheet: Plants

Plants Review Worksheet

Grade 7 Chemistry Plants Review Worksheet Medium 40 Questions 13 Views

Classroom Worksheet

Grade 7 Chemistry Review Worksheet: Plants

Plants Review Worksheet

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Grade: Grade 7

Subject: Chemistry

Topic: Plants

Time: 20 Minutes

Difficulty: Medium

Questions: 40

Instructions:
Read each question carefully and answer in complete sentences when needed. Show your thinking for questions that ask you to explain. This worksheet reviews how plants use chemicals, materials, and energy to grow and survive.

Skills Practiced:

Plants
Chemistry
Critical Thinking
Problem Solving

1Question

What do plants need from the environment to make their own food?

2Question

What is the green substance in leaves that helps plants capture light energy?

3Question

Which gas do plants take in from the air during photosynthesis?

4Question

Which gas do plants release during photosynthesis?

5Question

What is the process called when plants use sunlight to make food?

6Question

In which part of the plant does most photosynthesis happen?

7Question

What part of the plant takes in water from the soil?

8Question

What part of the plant moves water from the roots to the rest of the plant?

9Question

What are the tiny openings on leaves called that help with gas exchange?

10Question

Why do plants need water? Give one reason.

11Question

What is the main product of photosynthesis that plants use for energy and growth?

12Question

Write the word equation for photosynthesis.

13Question

Why is sunlight important for plants?

14Question

What do we call the movement of water through a plant from roots to leaves?

15Question

What is transpiration?

16Question

How does transpiration help a plant?

17Question

Name one mineral nutrient plants absorb from the soil.

18Question

Why do plants need nitrogen?

19Question

Why do plants need magnesium?

20Question

What is the function of roots besides absorbing water?

21Question

What is the difference between xylem and phloem?

22Question

Which tissue carries food made in the leaves to other parts of the plant?

23Question

Why do leaves usually have a large surface area?

24Question

How do chloroplasts help a plant cell?

25Question

What would happen to a plant if its stomata stayed closed all day?

26Question

Explain why too much heat can cause a plant to wilt.

27Question

What is turgor pressure?

28Question

Why do many plant cells have cell walls?

29Question

How are plant cells different from animal cells? Name one difference.

30Question

What role does the vacuole play in plant cells?

31Question

If a plant gets very little light, what will likely happen to photosynthesis?

32Question

Why might a plant in dry soil have smaller leaves or fewer leaves?

33Question

How do green leaves, roots, and stems work together to help a plant survive?

34Question

What is the importance of glucose for a plant besides energy?

35Question

Why do plants store starch?

36Question

How can a farmer improve plant growth by changing soil nutrients?

37Question

Why is chlorophyll important to the chemical process in plants?

38Question

Describe what would happen if a plant could not transport water from its roots to its leaves.

39Question

Explain how photosynthesis and respiration are related in plants.

40Question

A plant is kept in a dark cupboard for several days. Predict what will happen and explain why.

Answer Key

#	Answer
1	Plants need sunlight, water, carbon dioxide, and chlorophyll to make their own food.
2	Chlorophyll.
3	Carbon dioxide.
4	Oxygen.
5	Photosynthesis.
6	Mostly in the leaves.
7	The roots.
8	The stem, through vessels called xylem.
9	Stomata.
10	Plants need water for photosynthesis, transport of materials, and keeping cells firm.
11	Glucose, a type of sugar.
12	Carbon dioxide + water + light energy -> glucose + oxygen.
13	Sunlight provides the energy needed for photosynthesis.
14	Transpiration stream.
15	Transpiration is the loss of water vapor from a plant, mainly through the stomata in leaves.
16	It helps pull water up through the plant and cools the plant.
17	Examples include nitrogen, phosphorus, potassium, magnesium, or calcium.
18	Plants need nitrogen to make proteins and grow properly.
19	Plants need magnesium to make chlorophyll.
20	Roots also anchor the plant in the soil and may store food.
21	Xylem carries water and minerals; phloem carries sugars and other food materials.
22	Phloem.
23	A large surface area helps leaves capture more sunlight for photosynthesis.
24	Chloroplasts contain chlorophyll and are where photosynthesis happens.
25	The plant would take in less carbon dioxide, so photosynthesis would slow down.
26	Too much heat can increase water loss by transpiration, causing cells to lose turgor pressure and the plant to wilt.
27	Turgor pressure is the pressure of water inside plant cells that helps keep them firm.
28	Cell walls support the cell and help it keep its shape.
29	Plant cells have cell walls, chloroplasts, and a large vacuole; animal cells do not have chloroplasts or cell walls.
30	The vacuole stores water and helps keep the cell firm.
31	Photosynthesis will slow down because there is less light energy available.
32	Smaller or fewer leaves reduce water loss from transpiration.
33	Roots absorb water and minerals, stems transport them, and leaves use them with sunlight to make food.
34	Glucose is also used to make starch, cellulose, and other materials for growth and storage.
35	Plants store starch as a food reserve for later use.
36	By adding fertilizers or compost to replace missing nutrients such as nitrogen, phosphorus, and potassium.
37	Chlorophyll absorbs light energy needed to start photosynthesis.
38	The leaves would not get enough water for photosynthesis and the plant would dry out and die.
39	Photosynthesis makes glucose and oxygen, while respiration uses glucose and oxygen to release energy for the plant.
40	The plant will stop making enough food because it cannot photosynthesize without light, so it may become weak and eventually die.