changes 1
I am the gaseous state of water. What am I?
Water vapor
I am a process in which a liquid changes into a gas without boiling. What am I?
evaporation
I happen when liquids heat up and bubbles form. What am I?
Boiling
I happen when solid matter gains energy and turns into a liquid. What am I?
Melting
loses
What is solid, liquid, or gas?
The difference between the physical changes and the chemical changes is that the matter forms _________ matter and ______________ matter.
same, different
I am the process that locks (pack tightly together) particles into position to form a solid. What am I?
Freezing
This forms when different kinds of matter are put together.
ex) M&M chocolates and jelly beans in a bowl
mixture
What uses energy from the Sun to make oxygen and water?
green plants
Solids, liquids, and gases have to gain or lose me in order to change states. What am I?
Energy (heat)
I happen when particles of water vapor lose energy and come closer together. What am I?
Condensation
This forms when matter is mixed evenly with another kind of matter.
ex) salt water
solution.
Give 3 examples of physical changes.
tearing, cutting, stretching, melting, condensation, evaporation
When baking soda and vinegar are mixed, which gas forms bubbles?
Rust can form on a car. This is the chemical changes that happened on parts made of which metal?
iron
What are two things form when a log burns?
1) gas & 2) solid
(After wood burns, what does the wood log change into?)
ash, carbon dioxide
What is a change that causes different kinds of matter to form?
chemical change
Name three ways to separate mixtures.
1. by properties (size, shape, or color)
2. pick out each different type of matter.
3. by evaporation
4. using a filter
5. make objects float
6. using a magnet
Given 2 signs of chemical changes.
* rust
* ash
* formation of gas
* light and heat
* change of color (color change)
What is a word for different kinds of matter mixed together?
mixture
Clouds are an example of a mixture. What are clouds made of?
air, dust, water droplets
What is one or more kinds of matter mixed EVENLY into another kind of matter?
solution
True/False
Some solutions have no liquids at all.
True (air is a solution of different gases: nitrogen, carbon dioxide, oxygen and other gases / brass is copper + zinc)
What are rocks that have useful minerals where metals come from?
ores