A group of parts that work together is called a ...
Prototypes are used to ....
How would you calculate the density of an object?
In the laboratory, volumes of liquid are usually measured with...
One useful tool that may help a scientist interpret data by revealing...
Acids are described as corrosive because they....
Anything that has mass and takes up space is called...
What is the greatest number of valence electrons an atom can have?
During an experiment, which factors must be controlled so that...
When scientists create a representation of a complex process, they are...
During an experiment, if you purposely change the temperature to test...
The energy of matter in motion is called....
How many meters are there in a kilometer?
What is the first thing you should do if an accident occurs?
Which of the following is a valid reason why a scientist might reject...
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Because atoms are so small.....
From an element's location in the periodic table, you can...
What is the chemical name for the compound with the formula Na2 S...
The metric system of measurement is based on the number ....
Chemistry is....
Which of these statements about a column of the periodic table is...
An ionic bond is the attraction between....
An engineer is a.....
A chemical reaction that absorbs energy in the form of heat is...
Ions that are made of more than one atom are examples of ....
CaCO3 represents a chemical…..
In the periodic table, the most reactive metals are found ....
Observations that deal with a number or amount are called...
The measurement of how much mass is contained in a given volume is...
Which is a characteristic property of acids?
A summary of what you have learned from a scientific experiment is...
When an atom loses an electron, it becomes a ....
The density of a block of wood with a volume of 50 cubic centimeters...
Which of the following is a characteristic property of ionic...
How do liquid water, ice, and water vapor differ from each other?
Which stage of the scientific process enables a scientist to check the...
Using one or more of your senses to gather information is called....
In science, a hypothesis must be
Soil, a salad, and sugar water are all examples of ....
The factor that may change in response to the manipulated variable is...
One example of a chemical change is...
You can find the pH of a substance by using...
What is the goal of technology?
A chemical equation that shows the same number of each kind of atom on...
When scientists put things into categories or group together items...
What happens when chemical bonds break and new bonds form?
The elements in a column of the periodic table ...
H2O, CO2, and C12H22O11 are all examples of chemical…
Which of the following terms means that metals can be pulled into thin...
Electrons involved in bonding between atoms are...
Explaining or interpreting the things you observe based on reasoning...
A row across the periodic table is called a ....
If you heat a liquid and measure the temperature at which it boils,...
Making a forecast of what will happen in the future based on past...
In water, bases form ...
In a scientific experiment, the responding variable can also be called...
Which group contains the most elements?
A covalent bond in which electrons are shared unequally is...
To calculate the density of an object, you would....
What can you tell about methane (CH4) from its molecular formula?
Mass and weight are different because...
Science and technology are...
Which particles in atoms have a negative electric charge?
The basic unit of length in the metric system is the ...
What holds atoms together in a molecule?
The number placed below an element's symbol in a chemical formula...
Fireworks exploding in the sky and giving off light are an example of...
Table sugar and table salt are examples of
If a shoe box measures 6 cm high, 7 cm wide, and 20 cm long, what is...
Which is a likely use for a base?
A line graph shows...
Normal rainfall is slightly acidic, which means its pH must be...
How many chemical bonds can each carbon atom form?
A possible explanation for a set of observations or answer to a...
Each family in the periodic table has its own characteristic...
Which of the following is NOT an example of a chemical change?
Observations that deal with descriptions that cannot be expressed in...
Which particles in an atom are in the nucleus?
Most metals are NOT...
Carbon is able to bond with atoms of other elements in many different...
If you describe methane as a gas that easily catches fire, you are...
One example of a physical change is...
The pH scale measures....
The most important lab safety rule is...
The atomic number of an element is based on the ....
A chemical bond formed when two atoms share electrons is called...
Which parts of the atom move around the nucleus?
The volume of an irregular object can be measured by...
What is a double bond?
The first step in designing or redesigning a product is...
In a water solution, how do acids differ from bases?
A well-tested explanation for a wide range of observations or...
A metal washer has a mass of 0.27g and a volume of 0.1 cubic...
The amount of space an object takes up is its...
Ionic compounds are electrically...
The kilogram is the basic metric unit of....
In an atom, the number of protons equals the number of...
Which of the following is a balanced chemical equation?
Which is the correct chemical equation for the following statement?...