Show:
Density
Solubility
Energy
Space Science
Earth Science
100
If an object sinks in water, its density is –
Greater than water
100
Solubility is the ability of a substance to –
dissolve into another substance
100
Biofuels are made from
Plant products such as corn.
100
Why does the Sun appear to move across the sky?
Answer: The Earth rotates on its axis and the Sun appears to move through the sky.
100
Name three fossil fuels.
Answer: Natural gas, coal, and oil
200
Look at the data table, what is another object that belongs in column B?
leaf, ping pong ball, candle, etc
200
Which of the following will make a solution and why?
lemonade powder will dissolve in the water changing the properties of the powder.
200
Name one object that uses thermal energy?
stove, hair dryer, toaster, heavy winter coat.
200
Name the inner planets in order from the Sun.
Answer: Mercury, Venus, Earth and Mars
200
Describe how a U-shaped valley is formed.
Answer: A U-shaped valley is formed when a glacier slides down from the mountains over a long period of time and erodes the rocks and soil in its path leaving a valley behind.
300
Describe how column A and column B are different.
Colum A lists things that sink in water and Column B lists things that float in water
300
Which substance is not soluble in water? salt sugar oil baking soda
Oil is not soluble in water.
300
List the five forms of alternative energy sources.
Biofuels, geothermal, solar, hydroelectric and wind.
300
Which planets have a faster rotation time than Earth?
Answer: Jupiter, Saturn, Uranus, and Neptune.
300
Name two landforms that were created by deposition.
Answer: Sand dunes and delta
400
Why is it important for people who cannot swim to wear life jackets? ( use science vocabulary words in your explanation )
Use the words density, sink and float in your answer.
400
A student combines salt and iron fillings in a beaker or water. The salt dissolves in the water, but the iron fillings sink to the bottom of the beaker. What can you conclude about the salt and iron fillings?
The salt is soluble in water and the iron fillings are not soluble in water.
400
Which of the following items would you choose to keep a drink cold and why?
Newspaper, because the temperature only rose by 5°C which means newspaper is a good insulator.
400
In approximately how many days will the Earth be on the other side of the Sun? Explain your answer.
Answer: In approximately 182 days the Earth will be on the other side of the Sun. It takes 365 days to make one complete revolution and half a revolution would be half the number of days.
400
Explain how sedimentary rocks are formed.
Answer: As sediments are deposited over time, the sediments on the bottom are cemented and compacted together by pressure from the sediments or water from above and from the heat of the Earth.
500
In a lab experiment, students are asked to record if items sink or float. Damon has an object with a mass of 47g and a volume of 68 mL. Will his object sink or float and why?
Damon’s object will float because the volume is greater than the mass.
500
If a student adds purple drink mix and sugar to water, what changes will most likely occur to the substances?
The purple drink mix and the sugar will dissolve in the water changing the physical properties of the drink mix and the sugar. The water will turn purple and become sweet changing the physical properties of the water.
500
A carpenter is putting together chairs and uses an electric drill to drive screws into the legs to attach them to the seat. What types of energy is the carpenter using to build the chairs?
electric energy to run the drill and mechanical energy from the drill to drive in the screws.
500
If the Earth were closer to the Sun how would that affect its revolution? Explain your answer.
Answer: Earth’s revolution would become shorter. This would occur because the path would become shorter and it would not take as many days to travel completely around the Sun.
500
The Earth’s surface is covered with a variety of different landforms that were formed by erosion and deposition. Explain three agents of that cause erosion and deposition and describe how these processes create landforms.
Answer: The processes of erosion and deposition are caused by water, wind, and ice. Running water carries away weathered rock material, carving out canyons. The eroded rock material can be carried long distances in rivers and then deposited at the mouth of a river, forming a delta, where the speed of the water slows, and the sediment settles out. The building of dams can trap sediment, keeping it from getting to the mouth of the river and thus causing the delta to erode away. Wind can pick up sediment, especially in dry areas, and the sandblasting effect can sculpt rock into a variety of shapes. Wind can also deposit sand around obstacles, where it can pile up and create sand dunes. Glaciers erode