Name 1 metal that is magnetic
Cobalt, nickel and iron
Best substance used to dissolve other substances
Water
Give an example of matter going through a physical change.
Ice (solid) melting to water (liquid). Casting metal (melting metal to a liquid). Rocks and shells breaking down to form sand.
Write the formula for Carbon Dioxide on the board.
CO2
Atomic Theory
Electrical conductivity, Heat conductivity, and magnetism
Used to dissolve vegetable oil
Vinegar
How does dew form on grass?
Dew forms on grass when water vapor in the air condenses.
Write the formula for Hydrogen gas on the board.
H2
Example of a metal that conducts heat
cast iron, copper
This affects how substances dissolve
Temperature
Is matter conserved during a physical change?
Yes. No matter is lost and no matter is gained.
Write the formula for water on the board.
H2O
How many atoms in all?
Example of a metal that conducts electricity
Copper
Evidence to prove the air you breathe takes up space
The air we breathe takes up space. We can prove this by blowing into a balloon. The balloon will expand when air is blown into it. This is evidence that the air we breathe takes up space.
When making slime, is it a physical change or a chemical change?
Chemical Change
Odorless, colorless, 1 carbon atom and 2 oxygen atoms, we breathe it out, plants take it in to make food.
How many atoms are naturally found on earth?
94
List the Design Process in order
1. Define the problem 2. Plan a solution 3. Make a model 4. Test the model 5. Evaluate the redesign
If you put sugar in water, it will dissolve. What evidence could you use to prove the sugar is in the water.
Many answers.
The sugar water could be boiled. The water will evaporate, leaving the sugar on the bottom.
Identify the properties of the water and the properties of the sugar.
Is casting metal a physical change or chemical change?
Physical Change.
1. Formation of gas
2. Change of odor
3. Change of color
4. Change of temperature
5. Light 6. Precipitate
What element occurs most in the universe?
Hydrogen