Showing Results for mathematics answer key

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

Help your kindergarten science maven explore the water cycle without getting everything wet.

In this project children practice the scientific method while playing with puffy paint.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

Start your toy engines -- this is going to be a fast and friction-filled race!

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This science fair project idea investigates if fats add to the flavor of food.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.