Grade 8 STEM Worksheet: Plants Assessment Prep

Plants Assessment Prep

Grade 8 STEM Plants Assessment Prep Challenging 25 Questions 20 Views

Classroom Worksheet

Grade 8 STEM Worksheet: Plants Assessment Prep

Plants Assessment Prep

Name____________________________

Date________________

Score______ / 25

Grade: Grade 8

Subject: STEM

Topic: Plants

Time: 20 Minutes

Difficulty: Challenging

Questions: 25

Instructions:
Read each question carefully. Answer in complete sentences when needed. Show your work for calculation questions. Use scientific vocabulary and explain your thinking clearly.

Skills Practiced:

Plants
STEM
Critical Thinking
Problem Solving

1Question

What is the main function of roots in a plant?

2Question

Name the two main parts of a flower that are involved in reproduction.

3Question

What gas do plants take in during photosynthesis?

4Question

What pigment helps plants capture light energy for photosynthesis?

5Question

What is the process called when water moves from the roots to the leaves through the plant?

6Question

Why do plant leaves usually have a large surface area?

7Question

What is the job of the stem in most plants?

8Question

Describe one way plants respond to light.

9Question

How are xylem and phloem different?

10Question

Why do plants need both sunlight and carbon dioxide for photosynthesis?

11Question

A plant is placed in a dark closet for a week. Predict one effect on the plant and explain why.

12Question

What is pollination?

13Question

Explain the difference between pollination and fertilization.

14Question

Why are roots often covered with root hairs?

15Question

A student waters a plant too much for several days. What problem might occur?

16Question

Write the word equation for photosynthesis.

17Question

Why is transpiration important for a plant, even though it causes water loss?

18Question

A plant has yellowing leaves and is growing slowly. Name one possible nutrient deficiency and one reason it affects growth.

19Question

Explain how guard cells help a plant survive.

20Question

Why do plants in deserts often have thick stems or waxy leaves?

21Question

A student compares two plants: one in bright light and one in low light. Predict which plant will likely grow faster and why.

22Question

If the amount of carbon dioxide around a plant increases, what might happen to the rate of photosynthesis at first? Explain.

23Question

Describe how water moves from the soil into the roots and then up to the leaves.

24Question

A flowering plant produces seeds after fertilization. Explain how the seeds are formed.

25Question

A farmer notices that crop yield is lower in one field than another. The soil test shows low potassium and low nitrogen. Explain how these shortages could affect plant health and yield.

Answer Key

#	Answer
1	Roots anchor the plant and absorb water and minerals from the soil.
2	The stamen and the pistil (carpel).
3	Carbon dioxide.
4	Chlorophyll.
5	Transpiration helps pull water upward through the xylem.
6	A large surface area helps leaves absorb more sunlight for photosynthesis.
7	The stem supports the plant and transports water, minerals, and sugars.
8	Plants grow toward light; this response is called phototropism.
9	Xylem carries water and minerals, usually upward from roots. Phloem carries sugars made in leaves to other parts of the plant.
10	Sunlight provides energy, and carbon dioxide is a reactant used to make glucose.
11	The plant may become weak, pale, or stop growing well because it cannot make enough food without light.
12	Pollination is the transfer of pollen from the anther to the stigma of a flower.
13	Pollination is the movement of pollen to the stigma. Fertilization happens when the male and female cells join inside the ovule.
14	Root hairs increase surface area so the plant can absorb more water and minerals.
15	The roots may not get enough oxygen, which can damage the plant and cause root rot.
16	Carbon dioxide + water + light energy -> glucose + oxygen.
17	Transpiration helps move water and minerals through the plant and cools the leaves.
18	A nitrogen deficiency could cause yellowing leaves and slow growth because nitrogen is needed to make proteins and chlorophyll.
19	Guard cells open and close stomata to control gas exchange and reduce water loss.
20	These adaptations help store water and reduce water loss.
21	The plant in bright light will likely grow faster because it can photosynthesize more and make more food.
22	The rate may increase at first because carbon dioxide is a reactant, but only until another factor becomes limiting.
23	Water enters root hairs by osmosis, moves through the root tissues into the xylem, and is pulled up to the leaves by transpiration.
24	After fertilization, the ovule develops into a seed containing the embryo, and the ovary may develop into a fruit that protects the seeds.
25	Low nitrogen can reduce chlorophyll and protein production, causing poor growth and yellow leaves. Low potassium can weaken water regulation and overall plant function. Together, these shortages reduce plant health and lower yield.