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6.6B - Density
6.7A - Energy Sources
6.9C - Energy Transformation
6.6A - Metals, Non-metal, and Metalloids
6.11ABC -Solar System
100
A balance and a graduated cylinder are used to determine the density of a mineral sample. The sample has a mass of 14.7 g and a volume of 2.2 cm3. What is the density of the mineral sample?
6.7 g/cm³
100
Wind turbines are used as an alternative source of energy. They use wind currents to generate electricity. Energy can be harnessed from the wind because moving air has what type of energy?
Kinetic energy
100
Windmills are used to convert wind energy into a more useful form. In most cases, there are three steps in this process. The energy is in a different form at eat step. Which of the following flowcharts shows the most likely order of the energy changes? A. wind energy > mechanical energy > solar energy B. wind energy > thermal energy > mechanical energy C. wind energy > solar energy > electrical energy D. wind energy > mechanical energy > electrical energy
D. Wind energy > mechanical energy > electrical energy
100
All of these properties describe metals EXCEPT — A. malleable. B. conductor. C. brittle. D. shiny.
C. brittle
100
What holds the solar system together?
Gravity
200
The density of a sample of an unknown substance has a volume of 5 cm³ and a mass of 20 grams. What is it's density?
4 g/cm³
200
Striking a match, combining vinegar and baking soda to form CO2 gas, digesting food, and breaking light glow stick are all examples of what type of energy? A. Chemical Energy B. Light Energy C. Heat Energy D. Mechanical Energy
A. Chemical Energy
200
Hot air balloon rise when propane gas is lit at the bottom of the balloon. What energy transformations occur when propane gas is used to lift the balloon? A Mechanical > light > chemical
 B Chemical > mechanical > thermal C Thermal > chemical > light
 D Chemical > thermal > mechanical
D. Chemical > Thermal > Mechanical
200
What is a property of most metals? A. They are not malleable B. They are shiny and lustrous. C. They are very brittle when heated D. They are no conductors of electricity
B. They are shiny and lustrous.
200
What type of force keeps the planet orbiting the Sun?
Gravitational Force
300
A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. The water level rose to 35mL Calculate the density of the rock in g/mL.
14 g/mL
300
Which of these resources will most likely be depleted first? A. Solar Energy from a solar panel B. Wind Energy from a wind mill C. Fossil fuels D. Water from Hydro electric power plant
C. Fossil Fuels
300
Flashlights get their power from batteries. Which of the following transformations, or changes take place in a battery? A. Electrical energy is transformed into mechanical energy and heat energy. B. Chemical energy is transformed into electrical energy and heat energy. C. Mechanical energy is transformed into heat energy. D. Heat energy is transformed into chemical energy.
B. Chemical energy is transformed into electrical energy and heat energy.
300
Conductivity is a physical property of matter that describes its ability to — A. reflect light from its lustrous surface. B. transfer thermal and electrical energy. C. exist in nature as a solid, liquid, or gas. D. be hammered and rolled into thin sheets.
B. transfer thermal and electrical energy.
300
Pluto was discovered in 1930. I tused to be considered the 9th planet in our Solar System. In 2006, scientist around the world at the International Astronomical Union reclassified Pluto as a "dwarf planet." One reason for reclassifying Pluto is that its surface gravity is very weak. It has little effect not he orbits of other planets. What is the best explanation for this? A. The surface temperature on Pluto is below 0. B. There is no atmosphere surrounding Pluto. C. Pluto has a ver small mass compared to the other 8 planets. D. Pluto is partly made o five, which has no gravitational attraction.
C. Pluto has a ver small mass compared to the other 8 planets.
400
Two different bars of chocolate are being investigated by a group of students. They measured the mass and volume of each chocolate bar and recorded the results in the table below: Bar Mass (g) Volume (cm³) A 110 100 B 95 100 Density of water = 1.0 g/cm³ Calculate the density of each bar of soap.
Bar A is 1.10 g/cm³ Bar B is .95 g/cm³
400
In a nuclear power plant, the element uranium splits atoms in a process called fission. This process releases a large amount of energy. In order to provide the energy to factories and homes, the power plant needs to convert it into …..
Electricity
400
The following equation represent the process of photosynthesis in a plant. Light 6CO2 + 6H2O > C6H12O6 +6O2 Chlorophyll (Carbon Dioxide + Water, int he presence of light and Chlorophyl > Sugar and Oxygen What happens to most of the light energy during photosynthesis? A. It is transformed into heat energy. B. It is transformed into chemical energy. C. It is transformed into light energy. D. It is transformed into mechanical energy.
B. It is transformed into chemical energy.
400
Which of the following would help a student classify an unknown element as a metal, metalloid, or non-metal? A. Measure its conductivity B. Determine its density C. Find its melting point D. Observe its color
B. Determine its density
400
An object will continue moving in a straight line unless it is acted on by an unbalanced force. Which of the following best explains Earth’s motion? A. There is no unbalanced force acting on Earth because space is empty and nothing touches Earth. B. The gravitational force pulling Earth toward the sun is equal and opposite to the force pulling the sun toward Earth, so there is no unbalanced force acting on Earth. C. The sun moves in an elliptical orbit around Earth, and the sun’s gravity pulls Earth along. D. Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth.
D. Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth.
500
The mass of a 125 cm³ piece of material is 82.75 g. Determine the density of this material
0.662 g/cm³
500
The US consumes a lot of petroleum and natural gas. It is important to develop alternative sources of energy because petroleum and natural gas… A. Both will eventually used up all the oxygen needed for human survival B. Both are being spilled into the ocean faster than they are being used C. Both fail to store solar energy and both contain limited chemical energy D. Both are nonrenewable resources that are a limited source of energy that are almost impossible to renew.
D. It is nonrenewable resource that is a limited source of energy that is almost impossible to renew.
500
A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformations are taking place? A. Chemical → Light → Electrical B. Mechanical → Sound → Light C. Thermal → Solar → Electrical D. Electrical → Thermal → Light
D. Electrical → Thermal → Light
500
Electrical wires are made from metals such as copper and chromium because — A. wires can be stretched and bent. B. most metals have a metallic luster. C. electricity flows in a complete circuit. D. metals are good conductors of electricity.
D. metals are good conductors of electricity.
500
A visible streak of light which shows the path of rocky object which has entered Earth’s atmosphere is – A. a meteor. B. an asteroid. C. a Galilean moon. D. a comet.
A. a meteor.