Laura Lewandowski - Cool Biology Activities for Girls
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- Book:Cool Biology Activities for Girls
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- Publisher:Capstone
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- Year:2012
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Get your science groove on, and check out these awesome biology projects: Flowers that color themselves, Tricks that confuse the brain, Taking DNA from a banana. Biology is easy when youre having this much fun!
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What do horses, humans, and houseplants have in common? All these things are alive.They all need food, water, and a safe place to live. And they all have unique waysto get what they need to stay alive.
Biology is the study of living things. But if you think biology is all about frogguts, think again. Biologists study living things in all kinds of ways. They studyhow dolphins communicate. They examine the air we breathe. And they determine howthe delightful daffodils in your flower bed bloom. Check out the experiments in thisbook to see just how beautiful and fun biology can be.
To have the most fun with these projects, just follow a few simple guidelines:
- Read the project all the way through before you start.
- Gather all the materials you need.
- If you dont get the results you expect the first time, try it again. The experimentmight work a different way the next time.
- Have fun!
Roses are red. Violets are blue. Make some flowers any color you want to!
Supplies
- 4 tall glasses
- lukewarm water
- red, green, yellow, and blue food coloring
- 4 spoons
- scissors
- 4 white flowers
- ruler
- vase
TIP: Any white flower will work, but carnations work best for this project.
Fill each glass about half-full with water.
Add 30 drops of red food coloring to one of the glasses. Use a spoon to mix the water and the food coloring together.
Add 30 drops of green food coloring to another glass. Stir with a different spoon.
Add 15 drops each of yellow and red food coloring to a third glass. Stir.
In the last glass, add 15 drops each of blue and red food coloring. Stir.
Cut each flower stem at an angle 2 inches (5 centimeters) from the bottom. Place one flower into each glass.
In a few hours, you should start to see color in the flowers petals. Leave the flowers in the colored water overnight. The next day, take the flowers out of the colored water. Place them into a vase with fresh, clear water. Now you have a colorful bouquet to decorate your room.
Insider Info
Plants need food and water to survive. To get those nutrients, a plant absorbs whatit needs from soil or water. Then the water moves up the flowers stem into its leavesand petals. The plants leaves have tiny openings called stomata. Water evaporates from these tiny holes. In this project, the food coloring traveled up the stems withthe water into the flowers petals. The water evaporated, but the food coloring didnt.
absorb to soak up
evaporate to change from a liquid into a vapor or a gas
Who knew that blowing up balloons could be a science experiment? The next time yourehaving a party, test your lung power while you decorate.
Supplies
- permanent marker
- 2 balloons
- stopwatch
Using a marker, label one balloonwith the number one. Label theother balloon number two.
Give both balloons a good stretchin all directions to make themeasier to blow up.
With one breath, blow up balloonnumber one as much as you can.Tie off the end of the balloon.
Now run in place for three minutes.
As soon as time is up, take a deep a breath,and blow up balloon number two as muchas possible. Tie off the end. Can you tell adifference between the two balloons?
Insider Info
This experiment measured your lung capacity . Your lung size affected how much airyou blew into the first balloon. The second balloon you blew into was probably smallerthan the first. Heres why. Your bodys cells need oxygen to function properly. Whenyou exercise your muscles need more oxygen than normal. To get more oxygen into yourblood, you breath heavier. All that huffing and puffing makes it hard to get a deepbreath to blow up balloons.
capacity the total amount something can hold
cell the smallest unit of a living thing
Do you flinch when something comes at you in a 3D movie? If so, youve seen how yourbrain and eyes work together. For 3D movies and this activity, two eyes are definitelybetter than one.
Supplies
- 3 washable markersblack, red, and blue
- poster board, 22 inches (56 cm) by 28 inches (71 cm)
- newspaper
- yardstick
- masking tape
With the black marker, draw a targeton the poster board. The targetshould be made of three circles. Thesecond and third circles should fitinside the larger outside circle.
Spread a layer of newspaper on the floor.Place the target on the newspaper. Makesure the newspaper shows around all sidesof the poster board.
Measure 1 yard (.9 meter) from the edgeof the poster board. Place a piece ofmasking tape at the 1-yard mark. Standon the piece of tape. Have your friendstand next to the target, holding one armout with the red marker tip down.
Close one of your eyes. Direct your friendto move forward, backward, or side toside until you think the marker is rightabove the center circle. Then tell yourfriend to drop the marker.
Repeat the marker drop four more times withthe red marker. Keep one eye closed.
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