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| All life on earth depends on the energy that comes from the ______. |
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| The sun is a part of the __________. |
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| The sun is known as the _________. |
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| The surface of the sun is called the ________. |
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| The ______ of the sun is about 15 million degrees celsius. |
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| Scientist predict that the sun will keep burning for about ________ more years. |
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| The sun makes up almost ______ of the mass of our solar system. |
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| _________ on the sun changes hydrogen to helium. |
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| Scientist generally believe our solar system began about ___________ years ago. |
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| ______ is also what makes the plants round. |
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| cleans our body of poisons |
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| is in control of the thyroid glands |
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| your life pump that keeps your blood flowing |
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| The ________ is the largest organ inside our body. |
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| Your liver weighs about _______. |
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| Your ______ clean your blood and gets rid of waste that your body produces. |
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| Kidneys makes waste into ______, which is sent to your bladder. |
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| We have around _____ muscles in our body. |
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| makes the heart pump blood in and out |
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| muscles you CANNOT control |
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| What do you do about 20 times a minute without even thinking about it? |
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| What is the bad air that your body doesn't need? |
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| Your trachea is divided into how many parts? |
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| How big is an adult lung? |
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| What do 9,000,000 children in the United States have? |
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| What do lungs look like when they've been damaged from smoking? |
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| gray or black spots on them |
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| Your skin is thick as a _____. |
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| The vessels that carry blood away from your heart are called _____. |
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| The vessels that carry blood back to your heart are called _____. |
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| Human cells have ____ pairs of chromosomes. |
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| _____ controls eye color, skin color and hair color. |
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| The number of possible combinations of chromosomes is. _______. |
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| Tiny message units called _______. make up chromosomes. |
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| The genes themselves are made up of ______. |
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| _____ make sure you have all the right parts doing the right jobs. |
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| Gene controlled traits are |
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a. color blindness
b. eye color and shapr
c. blood type
d. dimples
e. hair color |
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| Gene controlled traits from the environment |
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a. height
b. weight
c. musically gifted
d. aptitude in math
e. blood pressure |
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| _______ is a learned trait. |
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| It takes _____ muscles to frown. |
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| How many bones do babies have? |
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| It takes _____ muscles to smile. |
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