States of matter
Scientists categorize matter into three types: solid, liquid, and gas. What are these groups called?
State of matter
Metals are good __________ of heat and electricity.
conductors
Universal ____________________ changes to different colors in different pHs.
Indicator
It is the deterioration of rocks, soils, and minerals through contact with water, atmospheric gases, sunlight, and biological organisms.
weathering
We can learn a lot about organisms that lived on Earth by looking at the ______ _______.
fossil records
This theory can be used to explain the properties of the states of matter.
Particle theory
_________have low melting points and are brittle. Most of them do not conduct electricity or heat energy well.
Non-metals
The ____________________ measures how acidic or alkaline a substance is.
pH scale
This is made up of pieces of rock and minerals, humus, bacteria, fungi, and small animals.
Soil
The fossil records tell us when different ______ of animals and plants first appeared on Earth.
species
Which of the following is not a process of changing state? freezing, condensation, vibration, and evaporation.
Vibration
_________ is a very light metal and is used for building aircraft.
Aluminum
A pH of below 10 is ____________________.
weakly alkaline
These rocks are formed when magma cools and solidifies. Some of these contain large crystals, small crystals, or no crystals at all.
igneous rocks
The fossil records tell us how species of animals and plants have ________ over millions of years.
changed
What substance has three different states of matter?
Water
Some _________ are lightweight, flexible and easily shaped.
plastic
Acids and alkalis can cancel each other out. When you mix them, they make a neutral solution. This is called ____________________.
neutralization/neutralisation
These porous rocks are made from little grains of sediment that are stuck together. They are made up of layers which sometimes contain fossils.
sedimentary rocks
Over millions of years, the land broke up and drifted apart. This idea is called the ___________ _____.
continental drift
Which of the following statements is not true about the changes of state?
Particles vibrate or move depending on how much energy they have.
Energy can be transferred to the particles.
The energy of the particles can overcome the forces holding the particles together
Particles lose their energy when heat is applied.
Particles lose their energy when heat is applied.
________bowls are best used for heating on a cooker.
Ceramic
____________________ are medicines used to neutralize acid in the stomach.
Antacids
These rocks are formed when heat and pressure change other rocks. They are usually harder than the rocks from which they are formed.
metamorphic rocks
In 1912, a German scientist called ______ ______ suggested that millions of years ago, all the land was one large continent.
Alfred Wegner