6th Grade · Science · Quiz · shared by Luke Morgan
This free 6th Grade Science quiz covers microbes in the soil, nitrogen fixation, and plant-bacteria partnerships. Ideal for your classroom.
Multiple Choice
1. _____ According to the passage, which element is described as one of the most important for a plant's survival?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Ammonia
2. _____ What is the problem most plants face regarding the nitrogen in the air?
A. There is not enough nitrogen gas in the air.
B. Nitrogen gas is poisonous to most plant roots.
C. Most plants cannot use nitrogen in its gas form.
D. Nitrogen gas prevents plants from absorbing water.
3. _____ Which of the following is a member of the legume family mentioned in the text?
A. Corn
B. Carrots
C. Lentils
D. Potatoes
4. _____ What do legume plants release to attract rhizobia bacteria?
A. Nitrogen gas
B. Specific chemical signals
C. Tiny bubbles of oxygen
D. Ammonia compounds
5. _____ Where do the bacteria first attach themselves when they arrive at the legume plant?
A. The leaves
B. The stem
C. The root hairs
D. The flower petals
6. _____ What is a nodule?
A. A type of harmful soil pest
B. A chemical released by the roots
C. A tube that carries water to the leaves
D. A small, round bump or knot on the roots
7. _____ What specific environment does a nodule provide for the bacteria?
A. A high-pressure, water-filled chamber
B. A safe, oxygen-controlled environment
C. A dark area with no nutrients
D. An area exposed to sunlight and wind
8. _____ What is the name of the process where bacteria turn nitrogen gas into a usable nutrient?
A. Photosynthesis
B. Nitrogen fixation
C. Chemical signaling
D. Natural decay
9. _____ In exchange for nitrogen, what does the plant provide to the bacteria?
A. Ammonia
B. Fertilizer
C. Carbohydrates
D. Nitrogen gas
10. _____ How does this partnership help the environment?
A. By removing all bacteria from the soil
B. By adding natural fertilizer back into the earth
C. By reducing the amount of sugar in the soil