Particles to small to see
You can’t see air, but you can feel it move when this happens.
Wind blows
You can use this sense to compare how rough or smooth an object feels.
Touch
When you mix vinegar and baking soda, bubbles form because this gas is released.
Carbon Dioxide
When an ice cube melts, the amount of matter stays the same because matter can’t be ________ or destroyed.
created
Plants need this to grow, which they get from the soil.
water and/or nutrients
When sugar “disappears” in water, it is actually ________ into tiny particles.
Dissolving
Whether something sinks or floats depends on its ________.
Density
Mixing salt and water forms a ________change.
Physical
You use this tool to measure whether the mass stays the same.
balance or scale
The energy in the food animals eat originally comes from this source.
When you smell popcorn across the room, it shows that particles can do this.
Move or spread out
You can use a magnet to test if a material has this property.
Magnetism
A change in temperature after mixing substances means this may have happened.
Chemical reaction or chemical change
The total mass of sugar water stays the same before and after mixing because of this law.
Law of Conservation of Matter
Most of a plant's mass comes from this.
Air
Tiny pieces of dust floating in sunlight help us see that matter is made of
Particles
You see two objects that look similar. What are three properties you could look at or measure to tell them apart?
Properties such as color, hardness, texture, or magnetism...
The reddish-brown color of rust shows that a _______ change has occurred.
Chemical
When gas forms in a sealed container, the mass stays the same because the gas can’t....
get out or escape
Plants are called ___________because they can make their own energy.
Producers
Scientists know that matter is made of atoms, which are the ________ of all matter.
Building blocks / smallest units
Scientists use these to identify unknown materials.
Its properties
If a change cannot be reversed easily, it’s called a ________ change.
Chemical
Heating, cooling, or mixing may change how matter looks, but not how much there is. This means matter is ________.
conserved
Draw a food chain that has at least three animals....
answers vary