What are three physical changes you can make to a piece of paper?
Coloring, cutting, crumpling.
100
What are properties? Give three examples.
Traits of matter. Color, shape, smell, taste, feel, sounds, lengths, width, or mass.
100
What is a gas?
No definite shape or volume.
200
What are solids?
Definite volume. No definite shape.
200
How do scientists study atoms?
They use an electron microscope.
200
When water boils and turns into water vapor...name the change.
Physical change.
200
How are matter, atoms, and elements related?
All matter is made up of elements, which are made up of atoms.
200
What is mass?
A measure of the amount of matter in an object.
300
What happens to matter when it gains heat energy?
It evaporates and turns into a gas.
300
Why are the elements helium, neon, and argon located in the same column in the periodic table?
They are share similar properties.
300
Name the signs of a chemical change?
Light, heat, color change, and formation of gas.
300
What kind of changes occur as you blend pancake mix, milk, and an egg and then heat the batter to make pancakes?
A physical change occurs when the ingredients are blended together. A chemical change occurs then the batter is heated.
300
A fruit salad is an example of...
A mixture.
400
What are two properties of all types of matter?
All matter has mass and takes up space?
400
Why are the properties of water and sugar different?
Hydrogen and oxygen join in different ways to form water and sugar. Sugar also contains carbon.
400
Name three examples of chemical change.
Spoiled food, burning logs, or cooking eggs (answers vary)
400
How has our understanding of matter changed over time?
People once thought that all matter was made up of earth, fire, air, and water. Today we know all matter is made of elements.
400
What happens when a gas loses heat energy?
Condensation.
500
How can you measure the mass of an object?
Use a pan balance.
500
What is the periodic table and how is it organized?
A chart that lists information about all the known elements (atomic #, element symbol and name) The left side lists metals, right side lists non-metals. Each column lists a group of elements that have similar properties.
500
Why would baking a cake in an oven be an example of a chemical change?
The heat from the oven causes the ingredients to join together, something new that tastes completely different is made.
500
How might a chemical change be different from a physical change?
Chemical changes create entirely new substances. Physical changes make something look different, but it is still the same substance.
500
What is an atom?
The smallest unit of an element that has the properties of that element.