Unit 1: Studying Science Test

What is a hypothesis?

• a collection of evidence

• a prediction of the correct answer to a question

• telling others about the results of an experiment

• trying to decide what the results of an experiment mean

Which of the following is an advantage only for a

3-D model?

• easy to store

• takes less time to make

• requires fewer tools to make the model

• can show the height of objects in the room, such as a desk

Aba is studying parts of a plant. Which tool would be most useful if Aba wants to see parts of a leaf?

• hand lens

• microscope

• magnifying box

• telescope

Cameron studies a model of a human heart. The heart has parts that Cameron can remove and hold in his hands before he puts the model back together. What kind of model is Cameron using?

• mental model

• computer model

• two-dimensional model

• three-dimensional model

Dan noticed that the day got warmer between breakfast and lunch. He recorded the temperature outside his window several times.

Time (a.m.) Temperature (°C)

9:00 22

10:00 25

11:00 27

Which of the following would be the most scientific way to show the data he collected?

• drawing a picture

• making a graph

• writing a paragraph

• making a timeline

Jacob wants to find out which cat food his cat likes best. What variable could he use in his investigation?

• amount of food

• type of cat food

• when he feeds his cat

• where he feeds his cat

Taylor wanted to determine if watering plants makes a difference in their growth. During her investigation, she watered only one of two plants. After a few days, she noticed that the plants looked different. What science skill did Taylor use when she noticed that one of the plants was drooping?

• communication

• investigation

• observation

• prediction

Scientists make observations, conduct experiments, and draw conclusions. Which statement is true of all scientists?

• Scientists study living things.

• Scientists study the natural world.

• Scientists study items found on Earth.

• Scientists study things found in outer space.

Kim places a cup of water and a cup of cooking oil in the freezer. Every 30 min, Kim checks the cups. She records the time when the liquid in each cup freezes. Which question is Kim investigating?

• Which liquid freezes faster, water or cooking oil?

• Which liquid tastes better frozen, water or cooking oil?

• Which item floats better, frozen water or frozen cooking oil?

• Which item melts faster, frozen water or frozen cooking oil?

Mike places a cup of water in sunlight and measures how the water temperature changes. Which unit of measurement will Mike use to record his data?

• grams

• centimeters

• degrees Celsius

• cubic centimeters