Question

observation: your flashlight doesnt work. question: why doesnt your flashlight work? 8. write a testable hypothesis. 9. do you think this is a testable hypothesis? \supernatural forces made my flashlight stop working.\ (circle one) yes / no practice science vocabulary: 10. which one of these is a quantitative observation? (circle all that apply) a. 4 cm b. green leaves c. 2 beans germinated d. alive a student runs an experiment to test the effect of sunlight on plant growth. some plants are grown in the dark, some in the shade, and some in full sunlight. then the height of each plant is measured. 11. what is the independent variable? a. amount of light b. height of plant c. type of plant 12. what is the dependent variable? a. amount of light b. height of plant c. type of plant 13. many students have trouble understanding the difference between the control group in an experiment and the constants. practice identifying which of the following are either the control group or constant variables in an experiment: write control or constant using the same type of soil for each plant the cell theory write down the 3 parts of the cell theory 1. 2. 3. take additional notes on key parts while you watch the video.

Explanation:

Step1: Answer question 8

A testable hypothesis for the flashlight - not - working problem could be "The batteries in the flashlight are dead."

Step2: Answer question 9

The hypothesis "Supernatural forces made my flashlight stop working" is not testable because supernatural forces cannot be objectively measured or observed in a scientific way. So the answer is No.

Step3: Answer question 10

Quantitative observations are those that involve numbers or amounts. "4 cm" and "2 beans germinated" are quantitative observations. So the answers are a. 4 cm and c. 2 beans germinated.

Step4: Answer question 11

In an experiment testing the effect of sunlight on plant growth, the independent variable is the factor that is being changed or manipulated. Here, it is the amount of light. So the answer is a. Amount of light.

Step5: Answer question 12

The dependent variable is the factor that is being measured and is affected by the independent variable. Here, it is the height of the plant. So the answer is b. Height of plant.

Step6: Answer question 13

Using the same type of soil for each plant is a constant variable as it is kept the same throughout the experiment to ensure that only the independent variable (amount of light) affects the dependent variable (plant height). So the answer is CONSTANT.

Step7: Answer question about cell - theory

1. All living organisms are made up of one or more cells.
2. The cell is the basic unit of life.
3. All cells come from pre - existing cells.

Answer:

1. The batteries in the flashlight are dead.
2. No
3. a. 4 cm, c. 2 beans germinated
4. a. Amount of light
5. b. Height of plant
6. CONSTANT

Cell - theory:

1. All living organisms are made up of one or more cells.
2. The cell is the basic unit of life.
3. All cells come from pre - existing cells.