PS Unit One Assessment Review

Which of the following is an example of a hypothesis?

• A. A researcher wants to understand why plants grow faster in sunlight than in shade.

• B. After reviewing the data, the researcher writes, “If plants are exposed to more sunlight, then they will grow faster than those in the shade.”

• C. The researcher reads several books and articles about plant growth and photosynthesis.

• D. The researcher sets up an experiment to measure the growth of plants in different lighting conditions.

Emma and Jackson are working on a science project. Which step of the scientific method do the work on to form a testable explanation?

• A. Conducting an experiment

• B. Formulating a hypothesis

• C. Collecting data

• D. Drawing conclusions

Why is it important to keep constants in an experiment?

• A. To ensure the results are due to the independent variable

• B. To make the experiment more complex

• C. To increase the number of variables

• D. To make the experiment longer

During a science experiment, Evelyn and William are trying to understand how plants grow. In which step of the scientific method do they gather information through their senses?

• A. Analyzing data

• B. Revising a hypothesis

• C. Drawing conclusions

• D. Making observations

Which statement contains a conclusion?

• A. The scientist goes back to the laboratory and fills each of two beakers with 1 liter of fresh water. Then he dissolves 35 grams of table salt in one of the beakers.

• B. They examine both beakers and finds the fresh water to be frozen. The salt water is still liquid.

• C. The scientist writes, “It appears that salt water freezes at a lower temperature than fresh water does.”

• D. The scientist then places both beakers in a freezer at -1 degree Celsius and leaves in the freezer for 24 hours.

David and Aria are preparing a report for an international science fair. What system of measurement should they use to ensure their data is universally understood?

• A. They should use local measurement units.

• B. They should use the International System of Units (SI Units).

• C. They should use customary units.

• D. They should use a conversion chart for different units.

Scarlett measures a quantity of water and determines it to be 250 milliliters. What quantity of measurement did she determine?

• A. Mass

• B. Volume

• C. Distance

• D. Time

What must be included to ensure a measurement is accurate?

• A. A formula

• B. A unit

• C. A graph

• D. A calculation

Jordan uses 5 Liters of fuel every day. How many kiloliters does he use each day?

• 0.005 kL

• 0.05 kL

• 0.5 kL

• 5 kL

The Hoba meteorite, discovered in Namibia, is the largest known meteorite on Earth. It has a mass of 60,000 kilograms. How much is the mass of this meteorite in grams?

• 600,000 g

• 6,000,000 g

• 60,000,000 g

• 600,000,000 g