🔬 Models & Measurement
What is a scientific model?
A representation of an object, system, or process that helps scientists understand or study it.
What are the three common states of matter?
Solid, liquid, and gas.
What is an element?
A pure substance made of only one type of atom.
What is energy?
The ability to cause change or do work.
What is a force?
What is a force?
What is measurement?
The process of finding the size, amount, or degree of something using a number and a unit.
What happens to matter when it changes from a solid to a liquid?
It melts.
What is an atom?
The smallest unit of an element that retains the properties of that element.
Name one renewable energy resource.
Solar, wind, hydroelectric, geothermal, or biomass energy.
What is motion?
A change in an object's position over time.
Why do scientists use models?
Models help scientists represent, explain, predict, or study things that may be too large, small, complex, or difficult to observe directly.
What happens to particles when a substance is heated?
The particles generally gain energy and move faster.
What is the periodic table used for?
To organize elements according to their atomic number and chemical properties.
What is electricity?
The movement or buildup of electric charge.
What is a simple machine?
A device that makes work easier by changing the amount or direction of force needed.
Name one tool used to measure length, mass, volume, or temperature.
Ruler/meter stick, balance, graduated cylinder, or thermometer.
What are the three main particles found in an atom?
Protons, neutrons, and electrons.
What is a chemical reaction?
A process in which substances are changed into new substances with different properties.
What happens when opposite magnetic poles are brought together?
They attract each other.
Why are triangles commonly used in bridges?
Their shape provides stability and helps distribute forces through the structure.
Why might scientists change or improve a model?
New evidence or observations may show that the model needs to be changed to better represent reality.
What is the difference between a proton, neutron, and electron?
Protons have a positive charge, neutrons have no charge, and electrons have a negative charge.
What is the difference between an acid, a base, and a solution?
An acid and base are types of substances with different chemical properties, while a solution is a mixture in which one substance is dissolved evenly in another.
Give an example of an energy transformation.
A flashlight changes chemical energy in a battery into electrical energy and then light and thermal energy.
How is sound produced?
Sound is produced by vibrations that travel through a medium as a wave.