Science Unit 1 Review

A student wants to make a 2-D model of his classroom from a view that is looking down from the ceiling. Which of the following could BEST describe his 2-D model?

• a model with all the desks made out of craft sticks

• a drawing of the classroom's floor plan

• a model with walls and floor made of blocks

Which of the following is an advantage ONLY for a 3-D model?

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

• it is easy to store

• it takes less time to make

A student is studying the parts of a plant. Which tool would be MOST useful if the student wants to see the smallest parts of the leaf's cell?

• hand lens

• telescope

• microscope

Which of the following is a testable question that you can investigate?

• Which is the best constellation?

• How deep are all the craters on the moon?

• What time does the sun rise each day?

Why should groups show their data to one another?

• They are curious about what the other groups did.

• They want to record all of the measurements in the same notebooks.

• They want to compare their work because many measurements will give the best results.

Jeff 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 Jeff using?

• three-dimensional model

• two-dimensional model

• computer model

Scientists study the natural world. Evidence is an important part of their studies. What is evidence?

• an educated guess

• data that supports or rejects a hypothesis

• a statement about what will happen in an experiment

Jeni observes that snow is dry, light, and fluffy at times. At other times, snow is wet, heavy, and sticky. Jeni wonders what makes snow different. She wants to plan an investigation to find an answer. Why should Jeni research her question first?

• to make it easier to share results

• to decide whether the scientific method should be used

• to find information to help set up her investigation

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

• amount of food

• where he feeds his cat

• type of cat food

Some models have three dimensions. The dimensions are length, width, and height. Which model below has three dimensions?

• computer model of a skeleton shown on a monitor

• photograph of a skeleton

• plastic model of a skeleton