In salt water, this is what the water is known as.
What is the solvent?
100
This describes the change when water evaporates from the surface of the ocean.
What is a physical change?
100
This describes atoms of the same element that have different numbers of neutrons.
What is an isotope?
100
This is the part of the atom that is negatively charged.
What is electrons?
200
This is the name of a substance when all of the atoms are alike.
What is an element?
200
This is the difference between homogeneous and heterogeneous mixtures.
What is the substances can be easily identified in a heterogeneous and cannot in a homogeneous?
200
This describes what happens when a nail rusts.
What is a chemical change?
200
This is why atoms generally have a neutral charge.
What is atoms generally have the same number of protons and electrons?
200
Carbon has an atomic number of 6. This means it has ___.
What is 6 protons?
300
This is the difference between physical and chemical properties.
What is physical properties describe the substance physically while chemical properties describe how the substance will react to form other substances?
300
Color, shap, size, and melting point are all examples of this.
What is physical properties?
300
This mixture is made of different materials that can be easily distinquished.
What is a heterogeneous mixture?
300
This is the difference between the atomic number and the atomic mass of an element.
What is the atomic number is the number of protons only and the atomic mass is the number of protons and neutrons in the nucleus of an atom?
300
An alloy is a mixture. This describes and alloy.
What is a solid metal dissolved into another solid metal? ex. brass = copper + zinc
400
This is what happens when a mixture is distilled.
What is the mixture is separated by evaporating the liquid and condensing its vapor?
400
This is the difference between a solid and a liquid.
What is a solid has molecules that are closer together, move less, and have less energy? Also, a solid has a definite shape and volume while a liquid only has a definite volume.
400
Color change, bubbling or fizzing, light production, smoke, and the presence of heat are all evidence that this occured between two substances.
What is a chemical change?
400
This is the difference between carbon dioxide and phosphorous.
What is carbon dioxide is a compound and phosphorous is an element?
500
In salt water, this is what the salt is known as.
What is the solute?
500
This is the description of a gas.
What is matter with no defiite volume or shape. The molecules are moving freely and with much energy?
500
This cannot be physically seperated into its individual components.
What is a compound?
500
Absolute zero is at 0K or -273.15 degrees C. Scientists can cool samples to near absolute zero. This is what would happen if they could cool the samples to absolute zero.
What is motion of the particles whould stop?
500
The mass of a balloon, baking soda, vinegar, and a bottle was 150 grams while seperated. This describes why the mass should still be 150 grams after combined.