Mixtures & Solutions
What is a mixture?
A physical combination of two or more substances. The parts mix together, but they do not change into a new substance.
Draw a model of solid, liquid, and gas particles on the board.
Mrs. Walker will check!
When iron is exposed to water, what happens?
Rust forms
Which science tool do we use to see things up close?
Magnifying glass
If a light on a circuit turns on, it is a _____ circuit.
A. Open
B. Closed
B. Closed
What is a solution?
A uniform (homogeneous) mixture formed when a substance completely dissolves into a liquid.
When heat is added to a gas, the particles ______.
A. Speed up
B. Slow down
A. Speed up
What is the definition of the Law of Conservation of Mass?
Mass cannot be created or destroyed.
Magnet
What type of energy flows through a circuit?
A. Thermal
B. Chemical
C. Electrical
D. Positivity
C. Electrical
Is the water in a solution a solute or the solvent?
Solvent
In Celsius, if a sample of water is 100 degrees celsius or more, is it a solid, liquid, or gas?
Gas
An iron hammer weighs 30 grams. It is then left outside and accidentally gets rained on. After the rain it has some rust on it. After scraping off the rust, the hammer weighs 25 grams. How many grams of rust did they scrape off?
5 grams
Which tool do you use to measure the mass of something?
Scale or balance
When a light bulb turns on in a circuit, the electrical energy turned into _____ energy.
A. Thermal
B. Electrical
C. Solar
D. Cold
A. Thermal
Which one is an example of a solute?
A. Broth in a soup
B. Sugar in lemonade
C. Pasta in spaghetti
D. Ice in a coffee
B. Sugar in lemonade
If a sample of water is negative degrees in Celsius, is it a solid, liquid, or gas?
Solid
Which surface has the most friction?
A. Ice skating rink
B. Hardwood floor
C. Carpet
D. Tile
C. Carpet
How do you know if magnets will REPEL each other?
They have the same color end.
On an electrical circuit, if the arm of the switch is up, it means it is a ____ switch.
A. Open
B. Closed
A. Open
Mixtures can be identified and compared. What do ALL mixtures have in common?
A. They are a combination of of substances that give off a gas
B. They are any type of matter that can change its shape or color
C. They are any type of matter that evaporates when heat is added.
D. They are a combination of two or more substances that keep their identities.
D. They are a combination of two or more substances that keep their identities.
What is the range of temperature in Celsius, for a sample of water to be labeled a liquid?
Between 0 and 99 degrees Celsius
Four balls were thrown. How do you know which one had the most force applied to it?
A. It went the shortest distance
B. It went the highest up in the air
C. It looked the coolest
D. It went the farthest
D. It went the farthest
Which science tool do you use to measure the volume of water?
Graduated cylinder
In a circuit, the flow of energy is ____.
A. battery --> light bulb --> wire --> closed switch
B. light bulb --> wire --> switch --> battery
C. wire --> switch --> battery --> light bulb
D. battery --> wire --> closed switch --> light bulb
D. battery --> wire --> closed switch --> light bulb