Third Grade Science (For Homeschool or Extra Practice)

By Thomas Bell

This workbook, with 30 science experiments and 50 quiz questions, covers the following topics:
Matter, Light, Energy, Life Science, and Earth Science

If you are homeschooling (or if you are just trying to get extra practice for your child), then you already know that science workbooks and curriculum can be expensive. HomeSchool Brew is trying to change that! We have teamed with teachers and parents to create books for prices parents can afford. We believe education shouldn’t be expensive.

The problem portion of the book may also be purchased individually in “Third Grade Science (For Homeschool or Extra Practice).”

• Language: English
• Publisher: BookCaps
• Release date: Jun 2, 2014
• ISBN: 9781311052421

Thomas Bell

Tom Bell has been writing on and off (mostly off) for thirty years. His first memoir, My Dad Is A Freak, tries to reconcile his life of 50 years as a single man with his new life as an older dad. He lives with his wife and three (young!) kids in a suburb of Cleveland.

Book preview

Third Grade Science

For Home School or Extra Practice

By Thomas Bell

© 2011 by Golgotha Press, Inc./HomeSchool Brew

Published at SmashWords

www.bookcaps.com

Disclaimer

This book was developed for parents and students of no particular state; while it is based on common core standards, it is always best to check with your state board to see what will be included on testing.

About Us

Homeschool Brew was started for one simple reason: to make affordable Homeschooling books! When we began looking into homeschooling our own children, we were astonished at the cost of curriculum. Nobody ever said homeschool was easy, but we didn't know that the cost to get materials would leave us broke.

We began partnering with educators and parents to start producing the same kind of quality content that you expect in expensive books...but at a price anyone can afford. 

We are still in our infancy stages, but we will be adding more books every month. We value your feedback, so if you have any comments about what you like or how we can do better, then please let us know!

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Chapter 1: Energy

Energy is a necessary part of life. We as humans need energy to walk, run, and even think. Plants need energy to make sugars, which is their source of food and also need energy for their roots and leaves to grow. Energy comes in different forms which include:

Light energy- This is from light. This type of energy is especially important for plants when they undergo photosynthesis. During photosynthesis plants absorb light in their leave and take the energy from the light to make a sugar called glucose.

Heat energy- This is from the differences in temperature of objects. For example, if you touch a hot plate the heat from the plate is transferred to your hand and may cause a burn. Or, if you are cold and use a heated blanket, the heat from the blanket can help to warm your body. Heat energy can be generated from other types of energy like light or electrical energy. Take for example a light bulb. When it is on for a long period of time supplying light energy, it also can heat up and begin to radiate heat energy as well.

Motion or kinetic energy- This is also known as the energy of motion. Imagine spinning in a circle, and then you are generating kinetic energy by your movements. Take a balloon for example; the gas particles inside of it have kinetic energy as they move and bounce off of each other to keep the balloon inflated.

Potential or stored energy- This is energy that is waiting to be used. Potential energy is often stored inside of objects until it is ready to be used. Take for example, a rubber band. When you stretch it and do not release it, the rubber band has potential energy. When you release the rubber band and it flies across the room, it has converted the stored energy (from being stretched) to kinetic energy (energy of motion) as it takes off across the room.

Electrical energy- This form of energy comes from the movement of particles with charges. In nature, some particles have a positive charge while others have a negative charge. The interaction between positive and negative charges is what generates electrical energy. Power plants burn fossil fuels like coal, which create positive and negative charges that can be used to make electricity to light our homes and schools.

Chemical energy- The human body is a great example of chemical energy at work. Chemical energy is energy stored in the bonds of the foods we eat. If we eat a cookie, a sandwich, even a salad, there is energy stored within these foods. Our bodies digest the foods and store the energy from them for later use. The chemical energy within the body can be used to keep us awake, run a marathon, even pick up a book.

How can we make energy?

Energy can be renewable or nonrenewable. Renewable energy can be recycled or replenished whereas nonrenewable energy cannot be replenished and instead is used up completely. Gasoline is a type of nonrenewable energy source. When a car uses the gasoline, more has to be placed in the gas tank for the car to continue running (or creating electrical energy to power the car). Therefore, gasoline is consumed as the car is in motion. There is only so much gasoline to be extracted from the Earth. When these reserves are used up, we will have to turn to other options because gasoline cannot be naturally replenished. On the other hand, solar energy, or energy from the sun is a form of renewable energy. Solar panels can be placed on the roofs of houses or buildings and can absorb light energy from the sun and store it to then generate electrical energy within the building. This type of energy is also used up, but the next day when the sun rises again, the solar panels absorb more light and the energy is replenished. There are a few other renewable energy sources that we use and these are naturally occurring sources of energy that can be replenished over and over again.

Solar Energy

The source of solar energy on Earth comes from the sun or direct sunlight. Solar energy can be used to create electrical energy or can be used to make heat energy to warm objects. Solar energy is a