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1. Thinking about the Law of Conservation of Matter, what is true about chemical reactions

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20 points
A.the total mass of the reactants must be equal to the total mass of the product.
B. chemical equations must be balanced, ensuring the same number of atoms of each element are on both sides of the equation.
C. During a chemical reaction, atoms are simply rearranged to form new compounds, but the total number of atoms of each element remains the same
D. All of the statements are true

2. What statement is true about how humans contribute to the carbon cycle?
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20 points
A.. Burning Fossil Fuels
B.humans exhale CO2 as a byproduct
C. Both A and B
D. None of the statements are true

3. What are some of the unique properties of water? (Check all that apply)
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20 points
A. Water's ability to dissolve many substances,
B. Water resists changes in temperature, absorbing and releasing heat slowly.
C. Water's boiling and freezing points are important for ecosystems because they prevent drastic changes that could kill organisms
D. Water molecules stick together tightly due to hydrogen bonds, which are stronger than most other liquids

4. What property of water allows insects to "walk on water" and the intense feeling of belly flopping into a pool?
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20 points
A. Adhesion
B. High specific Heat
C. Surface tension
D. Evaporation
5. Which form or (state)of water has the highest density?
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20 points
liquid form
gas (water vapor)
solid (ice)
State of Florida

1 answer

Here are the answers to your questions:

  1. Thinking about the Law of Conservation of Matter, what is true about chemical reactions?

    • D. All of the statements are true.
      • All the options (A, B, C) are correct in the context of chemical reactions and the Law of Conservation of Matter.

  2. What statement is true about how humans contribute to the carbon cycle?

    • C. Both A and B.
      • Humans contribute to the carbon cycle through both burning fossil fuels and exhaling CO2 as a byproduct.

  3. What are some of the unique properties of water? (Check all that apply)

    • A. Water's ability to dissolve many substances.
    • B. Water resists changes in temperature, absorbing and releasing heat slowly.
    • C. Water's boiling and freezing points are important for ecosystems because they prevent drastic changes that could kill organisms.
    • D. Water molecules stick together tightly due to hydrogen bonds, which are stronger than most other liquids.
    • All of the statements (A, B, C, D) reflect unique properties of water.

  4. What property of water allows insects to "walk on water" and the intense feeling of belly flopping into a pool?

    • C. Surface tension.
      • Surface tension is the property that allows insects to walk on water and contributes to the sensation of hitting the water when belly flopping.

  5. Which form or (state) of water has the highest density?

    • liquid form.
      • Among the states listed, liquid water is the densest. Ice (solid water) is less dense than liquid water, which is why it floats.

If you have any more questions or need further clarification on any of the answers, feel free to ask!