Physical and Chemical Changes
Melting chocolate changes its state but not the substance. What type of change is this and how do you know?
What is a
Physical change.
The state of matter changes not the substance.
Which has more volume: a large empty box or a small heavier rock?
a large empty box
Ice is water in what state of matter?
You need water in this state of matter in order to do Ice-Curling.
Solid
Keeping steel out of the moving river will help prevent it from rusting.
True or false?
Inference or Observation?
True
Inference
Which magnetic poles attract each other?
opposite.
North and South
Does rusting change steel wool into a new substance?
Yes
Adding air to a tire changes which two physical properties?
Answer: What are mass and volume?
Water in a gas state of matter is called?
You would have this in a terrarium since it is a tiny environment.
water vapor
You need _____ and _____ to determine speed?
time and distance.
The less time = the faster you are
The longer distance= the faster you are
yes
What clue tells you a chemical change has occurred?
What is a
color change, odor change, or a new substance is formed.
A closed terrarium keeps all matter inside. What happens to its total mass over time?
It stays the same. Mass does not change.
Water has to be in which state to fall into the soil and travel up a root of a plant?
liquid
How can heat be measured?
using a thermometer
What does heat flow do to temperature?
increases temperature
Rust forming on steel wool is an example of what type of change?
Why did it rust?
Chemical Change
Steel has iron in it which rusts when it gets wet.
The mass of things stay the same, even if it changes its state of matter. Yes or No?
Yes
400 – Which state of matter has a definite shape and volume?
solid
Is moving water a source of energy?
yes, it can move objects?
What is an inference?
Write an example
claim/conclusion based on observations and data
Example: Taller students are faster runners than shorter people.
What happens when fruit rots and forms new materials with different properties?
DECAY
What is a chemical change (decay)?
What tool is best for measuring volume (how much space an object takes up)?
What is a
Tape Measure or Ruler to find Volume.
Name all three states of water.
Solid, liquid, gas
What type of energy comes from moving air?
Think of fast winds knocking a tree down, changing its position.
energy of motion
When analyzing data what should you look for?
numbers, titles, headings, graphs, tables, changing numbers (increase/decrease, staying the same)?