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10 g of a solid chemical reacts with a 10 g of a liquid chemical, the reaction bubbles and changes the color of the liquid.  The colored liquid weighs 13 g, what can be concluded?

• The gas produced from the bubbles weighed 5 g

• The bubbles were evidence of 7 g of matter being destroyed

• The gas produced weighed 7 g

• The gas produced weighed 13 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Where is potential energy the highest?

• W 

• X

• Y

• Z

Tags

NGSS.MS-PS3-2

If reaction starts with 20g of reactants it should produce 

• a total of 40g of products

• a total of 10g of products

• a total of 80 g of products

• a total of 20g of products

Tags

NGSS.MS-PS1-5

Which of the following best describes the Law of Conservation of Mass?

• Mass can be created and destroyed in chemical reactions.

• Mass is neither created nor destroyed in chemical reactions.

• Mass is always increased in chemical reactions.

• Mass is always decreased in chemical reactions.

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FL.SC.8.L.18.4

In a closed system, if 10 grams of hydrogen react with 80 grams of oxygen to form water, what is the total mass of water produced?

• 70 grams

• 80 grams

• 90 grams

• 100 grams

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FL.SC.8.L.18.4

Which of the following statements is true according to the Law of Conservation of Energy?

• Energy can be created from nothing.

• Energy can be destroyed completely.

• Energy can be transformed from one form to another.

• Energy is always lost in transformations.

Tags

FL.SC.8.L.18.4

A chemical reaction occurs in a sealed container. If the mass of the reactants is 150 grams, what should be the mass of the products?

• 100 grams

• 150 grams

• 200 grams

• 250 grams

Tags

FL.SC.8.L.18.4

Which of the following is an example of energy conservation in a living system?

• A plant converting sunlight into chemical energy during photosynthesis.

• A car engine burning fuel to produce motion.

• A light bulb converting electricity into light.

• A battery being charged.

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FL.SC.8.L.18.4

Which of the following processes demonstrates the conservation of mass?

• Burning wood and observing the ash.

• Melting ice into water.

• Dissolving sugar in water.

• All of the above.

Tags

FL.SC.8.L.18.4

What is the primary source of energy for most living systems on Earth?

• The Moon

• The Sun

• The Earth's core

• The ocean

Tags

FL.SC.8.L.18.4