Show:
Atoms
Elements
Chemical Physical Change
States of Matter
Classroom Investigations
100
What are the parts of an atom?
protons ,neutrons,and electrons
100
What is the atomic number for hydrogen?
one
100
Is ice cream melting a physical change or a chemical change?
a physical change
100
Is candle wax a solid, liquid,or a gas when it is heated?
Liquid
100
How do you make zlime?
You mix cornstarch and water.
200
How many atoms are in the ball of a ballpoint pen?
over one billion
200
Is sulphur a metal or a non-metal?
non-metal
200
When did people start studying changes of matter?
Middle ages (1200-1500).
200
What are the four main states of matter?
Solid, liquid, gas and plasma.
200
About how long does it take to melt an ice cube over a portable heating stove?
It takes 9-12 minutes.
300
How many neutrons are in lithium?
four
300
What does ductile mean?
Able to be drawn into wires.
300
Name two ways to describe a physical change.
1.Change in shape. 2.Change in size.
300
is it possible for a solid to turn straight into a gas?
YES
300
How do you make an apple battery?
You stick two metals into an apple hooked to meter.
400
What part of an atom is the nuclues and what is it made of?
The nucleus is the heavy central part of an atom and it's made of protons and neutrons.
400
How many elements occur in nature?
103
400
Name three ways to describe a chemical change.
1. A new subtance is formed. 2. There is a change in color. 3. Heat is given off or there is burning.
400
What are the three forms of energy?
Light, heat, and sound
400
If you put water, oil and an ice cube with green dye in a glass would the ice sink?
The ice would not sink.
500
How many protons make up an oxygen atom?
8 protons
500
What is the atomic number for molybdenum?
42
500
Atoms in a chemical change do what that makes it a chemical change?
Rearange.
500
What state of matter is neon?
Plasma
500
How does salt make an ice cube stick to a string?
The salt makes one layer of the ice melt then refreezes.