What is the definition of "science"?

• a container marked with a scale used for measuring liquids

• the study of the natural world

• a computer program that models an event or object

• the amount of space that matter takes up

What is the definition of "model"?

• the speed of an object in a particular direction

• the sprouting of a seed

• a computer program that models an event or object

• a picture, idea, or object that represents an object of process

What is a "pan balance"?

• a tool used to measure mass with units called grams (g)

• a tool that makes an object look several times bigger than it is

• a container marked with a scale used for measuring liquids

• a model that has the dimensions of width and height only

Tags

NGSS.5-PS1-2

What is "inference"?

• information you observe or information collected in numbers

• the study of the natural worlds

• an untested conclusion based on your observations

• using reference materials and talking to experts to learn what is known

What is a "variable"?

• the original or model on which something is based

• information that you gather with your senses

• any part of an investigation or experiment that can be changed

• a tool used to measure force with units called Newtons (N)

Tags

NGSS.MS-PS3-4

What is a "hypothesis"?

• a statement of what you think will happen and why. A possible answer to a question that can be tested.

• a procedure carried out to gather data about an object or event

• the original or model on which something is based

• the location of an object in relation to a nearby object or place

Students in Zoe's class measure the time it takes a toy car to move along a track. Why should Zoe compare her data to other students' data?

• to choose the best time to record

• to see if she needs to changer her data

• to decide why the car moved slowly

• to see if her data match other students' data

Jenna makes a 2-D picture model on a computer. Alfonso makes a 3-D diorama model. Which evidence supports the claim that the two models are different?

• Jenna's model shows only a view from the top of the classroom.

• Alfonso's model shows only the floor plan of the classroom.

• Jenna 's model cannot show the placement of objects in the classroom.

• Alfonso's model cannot show the placement of objects in the classroom.

Tags

NGSS.MS-ETS1-2

Kate thinks about how to plant a garden. She imagines where the garden will be. She pictures what will grow in her garden and where. Next, Kate draws a picture of her garden. What is Kate doing?

• She is creating two kinds of mental models.

• She is creating a two-dimensional model from a mental model.

• She is creating a three-dimensional model from a mental model.

• She is creating a three-dimensional model from a two-dimensional model.

Vanessa reads that a bird's bones are hollow but strong. Vanessa wants to build a three-dimensional model of a bird. Which material would be her best choice to use for bones in her model?

• toothpicks

• modeling clay

• blades of grass

• drinking straws