1. Unit 1 Lesson 3 How Do Scientists Use Tools? Copyright © Houghton Mifflin Harcourt Publishing Company

2. Unit 1 Lesson 3 How Do Scientists Use Tools? Florida Benchmarks Copyright © Houghton Mifflin Harcourt Publishing Company SC.3.N.1.1 Raise questions about the natural world, investigate them individually and in teams through free exploration and systematic investigations, and generate appropriate … SC.3.N.1.2 Compare the observations made by different groups using the same tools and seek reasons to explain the differences across groups. SC.3.N.1.3 Keep records as appropriate, such as pictorial, written, or simple charts and graphs, of investigations conducted.

3. Unit 1 Lesson 3 How Do Scientists Use Tools? Make It Clear! Copyright © Houghton Mifflin Harcourt Publishing Company Scientists use magnifying tools to help them see small objects. Magnifying tools make things look larger. Magnifying tools include microscopes, hand lenses, and magnifying boxes.

4. Unit 1 Lesson 3 How Do Scientists Use Tools? Close, Closer, Closest! Copyright © Houghton Mifflin Harcourt Publishing Company A hand lens has one lens and a handle. To use a hand lens, hold the lens near your eye. Then, move the hand lens closer to the object until the object is sharp and in focus.

5. Unit 1 Lesson 3 How Do Scientists Use Tools? Close, Closer, Closest! Copyright © Houghton Mifflin Harcourt Publishing Company A magnifying box has a lens in its lid. You can use a magnifying box to study things that are hard to hold, such as bugs.

6. Unit 1 Lesson 3 How Do Scientists Use Tools? Close, Closer, Closest! Copyright © Houghton Mifflin Harcourt Publishing Company A microscope magnifies objects that are too tiny to be seen with the eye alone. Most microscopes have two lenses that work together. You can use microscopes to study very tiny objects.

7. Unit 1 Lesson 3 How Do Scientists Use Tools? Measure It! Copyright © Houghton Mifflin Harcourt Publishing Company Measuring uses numbers to describe the world around you. There are several ways to measure. There is more than one tool and unit for each way to measure.

8. Length, Mass, and Volume A balance measures mass. Mass is the amount of matter in an object. The basic unit of mass is the gram. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?

9. Length, Mass, and Volume A balance has two pans. Put the object you are studying in one pan. Add masses to the other pan until the pans are balanced. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?

10. Length, Mass, and Volume Measuring tapes and rulers measure length. The basic units of length are centimeters, meters, inches, and feet. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?

11. Length, Mass, and Volume Volume is the amount of space matter takes up. You can use a graduated cylinder, measuring cup, or spoon to measure the volume of a liquid. You can use these tools to measure the volume of a solid that can be poured, such as salt. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?

12. Length, Mass, and Volume You use numbers to report measurements and compare objects. You can also order things using measurements. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?

13. Time and Temperature Copyright © Houghton Mifflin Harcourt Publishing Company Time Clocks and stopwatches are tools that measure time. The basic unit of time is the second. One minute is equal to 60 seconds. One hour is equal to 60 minutes. Unit 1 Lesson 3 How Do Scientists Use Tools?

14. Time These frogs are having a race. How could you use time to study their race? Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?

15. Temperature When you say that something is hot or cold, you are describing temperature. A thermometer is used to measure temperature. The base units of temperature are called degrees. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?

16. Temperature Most people around the world and scientists measure temperature using the Celsius scale. Most people in the United States measure temperature using the Fahrenheit scale. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?

17. How Do You Care for Tropical Fish? Copyright © Houghton Mifflin Harcourt Publishing Company Close Encounters To care for tropical fish, you must think like a scientist. Caring for public and home aquariums take similar skills: observing, inferring, measuring, and recording data. Unit 1 Lesson 3 How Do Scientists Use Tools?

18. Keep Good Records Keeping good records in your science notebook is important. Making correct measurements is part of being a good scientist. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 How Do Scientists Use Tools?