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Laabri

8th Grade S1 Final Exam

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Last updated 7 months ago
51 Nsɛmmisa
Unit 1: Nature of Science & Engineering
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Unit 2: Earth Science
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8.ESS.1
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8.ESS.1
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Unit 3: Substances & Chemical Reactions
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8.PS.7
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Unit 4: Resources & Thermal Energy
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Bonus Essay!
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1.

Which best describes "pseudoscience" and gives an example of it?

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2.

A scientific law...

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3.

A scientific theory...

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4.

If someone collects the temperature of a beaker of water at room temperature (about 20oC) five times and gets the following data, their data would be best described as...

20.2oC, 23oC, 18oC, 20.3oC

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5.

If someone collects the temperature of a beaker of water at room temperature (about 20oC) five times and gets the following data, their data would be best described as...

10.2oC, 10.1oC, 10.2oC, 10.0oC

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6.

Empirical Evidence is just another word for...

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7.

"The ceiling in my house is dripping water. It is also raining outside."

Which option is NOT a valid inference based on the observations above?

The following is a description of an engineering project:

A student sets out to build a robot. This robot has to use a certain brand of pieces, cannot be longer than 19", wider than 11", or taller than 15", and cannot use more than 6 motors. The goal is to make the robot able to pick up a 3"x3" cube and score it into a goal area, preferably quickly.

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8.

Which would be a "criteria" of this design?

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2
2
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12.

Greenhouse gases, such as CO2, H2O, SO2, and NO2, ...

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13.

According to these graphs, the global average temperature has been , and the global average sea level has been

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15.

Drag and drop the various steps of the water cycle to their appropriate boxes.

Mmuae Afoforo a Wobɛpaw:
precipitation
run-off
condensation
transpiration
evaporation
infiltration
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16.

Which of the following helps water to precipitate and is considered one of two things to power the water cycle?

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17.

Which of the following helps water to evaporate and is considered one of two things to power the water cycle?

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18.

The main cause of air pollution is...

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19.

The main cause of water pollution is...

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20.

The main cause of land pollution is...

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21.

Greenhouse gases are called greenhouse gases because...

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22.

Climate Zones are determined by...

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23.

Sub-climates within a climate zone are determined by...

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24.

When two air masses run into each other, weird weather can occur (tornadoes, thunderstorms, etc.). What do we call it when two air masses run into each other?

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25.

Protons have a mass of.

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26.

Neutrons have a mass of.

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27.

Electrons have a mass of.

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28.

On the periodic table, the elements are organized by increasing

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29.

Metals the zig-zag line.

Nonmetals the zig-zag line.

Metalloids the zig-zag line.

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30.

The atomic number always equals

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31.

The charge of an ion (charged atom) is always equal to

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32.

The mass number is always equal to

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33.

Based on the picture above (and the periodic table), answer the following questions:

What is the atomic number?

What is the mass number?

What is the chemical symbol?

What is the charge?

Mmuae Afoforo a Wobɛpaw:
+1
-1
7
Be
0
4
9
3
Li
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34.

Based on the picture above, choose the correct answers to the following questions:

  1. Is this a molecule or an atom?

  2. How many molecules are there?

  3. What is the formula for the whole picture?

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36.

Balance the equation. Be sure to SHOW ALL OF YOUR WORK!!

Put the coefficients into the equation here!

KCl+P4+P2O5

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38.

Which of the following is NOT an indicator that a chemical change likely occurred?

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39.

A synthetic material is...

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40.

A synthetic materials are made from...

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41.

Why are synthetic materials made?

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42.

The structure of a synthetic material describes its...

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43.

The function of a synthetic material describes its...

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44.

In creating synthetic materials, we sometimes hurt the Earth by...

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45.

When a substance increases in temperature, its particles...

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46.

Which state change does not involve an increase in thermal energy?

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47.

When a chemical reaction releases energy, its surroundings

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48.

When a chemical reaction causes its surroundings to become colder, it...

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49.

If you discover a chemical reaction that makes its surroundings warmer, what's one way you can increase the amount of heat it gives off?

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50.

Substances exist as solids, liquids, or gases due to their...

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51.

Bonus Essay! For bonus points, write 4-6 complete sentences responding to one of the following prompts:

A: Describe the difference between a Scientific Law and a Scientific Theory. Explain which one can change and why! It might help to even use examples of some scientific (theories or laws) that have changed over time, to illustrate how that works!

B: What is climate change, what causes it, and how can we fix it?

C: Describe the parts of a chemical equation (products, reactants, coefficients, etc), what it represents, and why we never change subscripts while balancing equations.

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9.

Which would be a "constraint" of this design?

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10.

The student comes up with the following 4 designs. Which would be best?

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11.

The student choses the following design:

A robot that uses 7 motors, moves at 1mph, and can pick up 1 cube at a time.

Which of the following sets of changes would most improve upon the student's design, allowing it to fit within its criteria and constraints?