Unit 1 Test (Life Science) - 2023

1. Which of the following is a qualitative observation?

• The patient has a fever of 101.3 degrees Fahrenheit.
• The patient probably has COVID.
• The patient probably has Chickenpox.
• The patient has a rash and a runny nose.

2. Which of the following is a quantitative observation?

• The patient has a fever of 101.3 degrees Fahrenheit.
• The patient probably has COVID.
• The patient probably has Chickenpox.
• The patient has a rash and a runny nose.

3. A student observes a stream, and records the following four statements in her notebook. Which statement is an inference?

• The maximum water depth is 8.7 meters.
• The water is so clear that the rocks at the bottom are visible.
• The stream was formed during the last ice age.
• The water temperature is 16 degrees Celsius.

4. Below is a picture of the bottom of a Sea Star. Which of the following is the BEST, most detailed qualitative observation of this Sea Star?

• The sea star is white.
• The sea star smells bad.
• This side of the sea star has an indent in the middle, with "arms" projecting out from the middle. There are whitish-pink circular objects in the middle of the arms, and it looks like there are white spikes or hairs on the outsides of the arms.
• The sea star eats clams.

5. What is the measurement of the nail below, to the nearest tenth of a centimeter?

• 2 cm
• 2.0 cm
• 2.5 cm
• 3 cm

6. What is the measurement of the leaf below, to the nearest tenth of a centimeter?

• 500 cm
• 5.0 cm
• 5.5 cm
• 6 mm

7. Round 5.4629 to the nearest tenths place.

• 5
• 5.4
• 5.5
• 5.46

8. What is the measurement on the triple beam balance below, to the nearest tenth of a gram?

• 70.0g
• 70.7g
• 77.0g
• 77.5g

9. A student performed an experiment to determine the effect of the amount of screen time at home on their ability to focus in school. The independent variable in this experiment is:

• Ability to focus in school
• Type of screen
• Amount of screen time
• Grades

10. When you are analyzing the results of your test, why is it helpful to collect and analyze more data, rather than just doing the experiment one time?

• Collecting more data and getting the average will show what happens more often and is a better reflection of reality (what really happens)
• Collecting more data and getting the average will show you less of the overall results
• Collecting more data and getting the average is actually too time consuming, and not worth the effort
• Collecting more data and getting the average is fun because you get to use the computer