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Laabri

Unit 1 Practice

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30 Nsɛmmisa

Sig Fig Extra Practice

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1

Element, Compound, Homogeneous, Heterogeneous

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Percent Error, Accuracy, and Percision

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Density

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Scientific Method

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Chemical Vs. Physical Change

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Matter and Phase Changes

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Asemmisa {{asɛmmisaAhyɛnsode}}
1.

How many sig figs are in the following value: 9.30?

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2.

How many sig figs are in the following value: 0.005?

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3.

How many sig figs are in the following value: 3400?

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4.

Round 7843 to 2 sig figs?

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5.

Round 0.0054832 to 2 sig figs?

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6.

Is the following an element, compound, homogeneous, or heterogeneous: Silver?

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7.

Is the following an element, compound, homogeneous, or heterogeneous: NaCl?

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8.

Is the following an element, compound, homogeneous, or heterogeneous: Carbon?

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9.

Is the following an element, compound, homogeneous, or heterogeneous: lucky charms cereal?

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10.

Is the following an element, compound, homogeneous, or heterogeneous: hot sauce?

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11.

Is the image below show values that are accurate, precise, both or neither?

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12.

Which student is the most accurate?

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13.

Which student is the most precise?

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14.

Find the percent error for trial 1 for student B?

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15.

What is the volume of the apple?

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16.

If the mass of the apple is 30g, what is the density fo the apple?

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17.

If the apple is cut in half,what will happen when it is placed in water?

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18.

What will the density be when the apple is cut in half?

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19.

A scientist is testing If medical marijuana effective for pain reduction in people with chronic pain? They give Group A 1 gram of medical marijuana, they give Group B 2 grams of medical marijuana, and Group C they give no marijuana. Then they measure their pain using a survey on the 3rd day in the morning. What is the independent variable?

Asemmisa {{asɛmmisaAhyɛnsode}}
20.

A scientist is testing If medical marijuana effective for pain reduction in people with chronic pain? They give Group A 1 gram of medical marijuana, they give Group B 2 grams of medical marijuana, and Group C they give no marijuana. Then they measure their pain using a survey on the 3rd day in the morning. What is the dependent variable?

Asemmisa {{asɛmmisaAhyɛnsode}}
21.

A scientist is testing If medical marijuana effective for pain reduction in people with chronic pain? They give Group A 1 gram of medical marijuana, they give Group B 2 grams of medical marijuana, and Group C they give no marijuana. Then they measure their pain using a survey on the 3rd day in the morning. What is a constant?

Asemmisa {{asɛmmisaAhyɛnsode}}
22.

A scientist is testing If medical marijuana effective for pain reduction in people with chronic pain? They give Group A 1 gram of medical marijuana, they give Group B 2 grams of medical marijuana, and Group C they give no marijuana. Then they measure their pain using a survey on the 3rd day in the morning. What is a control?

Asemmisa {{asɛmmisaAhyɛnsode}}
23.

Is the following a chemical or physical change:

Water evaporates from a pot on the stove.

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24.

Is the following a chemical or physical change:

Baking soda and vinegar are mixed and bubbles form.

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25.

Is the following a chemical or physical change:

Calcium chloride is added to water and it heats up.

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26.

Is the following a chemical or physical change:

Dry ice turns from a solid to a gas

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27.
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28.
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29.

When a gas changes to a liquid, the space between the particles ____________.

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30.

Draw the particle diagrams to show condensation.