Changes and Rocks
Geraldo has an iron nail. After raining the nail get rusty. What has happened?
It has gone through a chemical change
Ralph left the refrigerator door open. His mom told him to close it because the food inside would get too warm. In what direction does heat flow?
Heat travels from Hot to Cold
City planners want to use a renewable form of energy, hydroelectric, to provide electricity to a town of 25,000 people. How does hydroelectric power work
Through the use of flowing water such as a dam or river. Flowing water is the key
Ysabella is learning to play the guitar. When she plays the strings, the guitar makes a sound. What creates this sound?
The vibrations of the strings
What two measurements are needed to determine the speed of an object?
Distance and time
Mr. C's science class is learning that substances can change in many ways. Sometimes a change will produce a new substance. This is called a chemical change. ell me three examples of a chemical change
what is cooking, change in color, change in odor ect...
Deon is cooking some chili on the stove. The chili is very hot. What kind of spoon should he use so that he does not burn his hand.
Wood, plastic or rubber spoon
Earth revolves around the sun. How long does it take for Earth to revolve around the sun.
365 days or 1 year
Arabella stretches a rubber band around a cup. She plucks the rubber band and observes a sound. What should Arabella do if she wants to hear a higher-pitched sound?
She needs to make it tighter
Kylie is learning about wind energy in science class. What kind of resource is wind?
A renewable resource
Evan found a mineral on a nature walk. The mineral was soft enough to scratch with his fingernail. It is made up of many thin sheets that can he pull apart into large flakes. What two properties is Evan testing?
Hardness and cleavage
Dre'lin sets up a glass with some ice cubes, water, and a thermometer. He watches the thermometer and it slowly begins to show a decrease in temperature. Explain what is happening
The heat from the water moves into the ice which cools the water
Wind, water, and ice are involved in both weathering and erosion. However, weathering and erosion are two different processes. What is the difference?
Weathering breaks the rock and Erosion moves it
True or False: Sound can travel through walls
True
What is always true about an object in motion
It is constantly changing its position
Serenity finds a piece of limestone. Limestone is created when different materials such as sand and shells form together and sometimes has fossils. What type of rock is limestone?
Sedimentary
Brian makes a poster for science class that shows examples of good insulators. Name three materials that make good insulators
wood, foam, plastic, rubber
Name at least two fossil fuels
oil, coal, gas, petroleum
How is sound produced?
From Vibrations
Jonathan wants to conduct an investigation. What would be his first step?
Form an investigation question.
How are Igneous rocks forms?
When lava cools and hardens
What is a conductor and what material makes good conductors
conductors transfer heat very well. Metals
How is electricity produced from moving water?
With the use of a hydroelectric facility the flowing water would go through a generator and create electricity
How is sound produced?
From vibrations
The sun appears to move through the sky during the day. For example, the sun always appears to rise in the east and set in the west. What is responsible for this apparent motion of the sun during the day?
The suns rotation on its axis