Vocabulary
What is matter?
Anything that has mass and takes up space
What are the three states of matter?
Solid, liquid and gas
Which of the following is not a physical property of matter?
a. color
b. hear
c. texture
d. hardness
b. hear
What is a Chemical change?
This results in a new substance and is permanently changed
True or false: Carbon dioxide and soil are two substances plants use to make sugar.
False-Carbon dioxide and water
What is the weight of a container before it is filled called?
Hint: We do this to our cups before we fill them so we can measure only the weight of the substance.
Tare
What is a solid?
This has definite shape and a definite volume
What is the definition of a physical property?
a description of an object made of matter ( ex. color, size, shape)
Which change occurs when you bake cookies?
Chemical change
You can change a liquid to a solid by __________ it.
What is freezing point?
The temperature at which a material changes from a liquid to a solid
Water freezes at 0°C and boils at 100°C. When water is heated from 40°C to 100°C, what will happen?
It will turn to a gas
Which of the following is NOT a physical property of a cupcake?
a. its size & shape
b. its state of matter
c. its color
d. how it makes you feel
d. how it makes you feel
What are three ways to tell a chemical reaction has happened?
1.Bubbles
2.Change of smell
3.Change of color
Why does iodine turns black with cornstarch and baking powder?
Iodine reacts in the presence of a starch.
What is mixture?
A combination of two or more substances that keep their own properties and can be separated.
During which state of matter are the molecules moving the fastest?
gas
Which of the following is NOT a physical property of sugar?
a. Different size pieces
b. Turns brown when heat is added
c. White crystals
B- Turns brown when heat is added
True or false: ice melting is an example of a physical change.
True
Joe placed a sugar water solution on the sunny windowsill. In a few days, all of the water disappeared. There were white crystals remaining in the glass. What happened to the sugar?
Sugar crystals became invisible in the water and then were visible after the water evaporated.
What is dissolve?
To mix completely with a liquid
Draw a picture to show how particles would look in a beaker for a solid, liquid and a gas.
Solid: particles tightly packed together
Liquid: particles packed together with little space in between
Gas: particles spread out
Using the physical properties of matter (color, texture, hardness, size, shape, odor) describe alum.
What type of change is involved when a nail rusts? Explain your answer.
Chemical change, the nail can not go back to its original form
Give an example of both a mixture and a solution
Mixture: fruit salad, spaghetti and meatballs
Solution: lemonade, chocolate milk, sugar water