Sci. Method
In an experiment, what do we call the ONE thing that the scientist changes on purpose?
Independent Variable
Which standard metric unit would you use to measure the length of a classroom floor: grams, liters, or meters?
Meters
What are the 3 subatomic particles that make up an atom?
Proton, Neutron, and Electron
True or False: An element is made up of only ONE type of atom.
True
What is the most abundant (most common) element found in Earth's crust?
Oxygen
You observe that a plant is 15cm tall. Is measuring a number like 15cm a qualitative or quantitative observation?
Quantitative
Which science tool measures mass (weight) in grams: a meter stick or a triple beam balance?
Triple Beam Balance
Which subatomic particle has a negative (-) electric charge?
Electron
Water (H2O) is made of Hydrogen and Oxygen chemically combined. Is water an element or a compound?
Compound
What is the symbol for the element Sodium on the Periodic Table: S, So, or Na?
Na
Qualitative or Quantitative?
The sheep was stamped with the number 43.
Qualitative
Which lab tool is the best for measuring liquid volume accurately: a beaker or a graduated cylinder?
Graduated Cylinder
Which two parts of an atom are found inside the center (nucleus)?
Protons and Neutrons
Look at the formula for water: H20. How many Hydrogen (H) atoms are in one molecule of water?
2
Silicon makes up most sand and rocks on Earth. Is Silicon the 1st, 2nd, or 10th most common element in Earth's crust?
2nd
"The girl is wearing a red shirt". Is this statement an observation or an inference?
Observation
If a line measures 17cm, how many millimeters (mm) is that?
170mm (hint: Multiply by 10!)
An atom has 6 protons, 6 neutrons, and 6 electrons. What is its atomic number?
6
Look at table salt: NaCl. How many total elements are in salt?
2 (Sodium and Chlorine)
On the Periodic Table, what does the Atomic Number tell you?
Number of Protons
Felipe made a visual model of an estuary, an ecosystem that is a made up of a mixture of both saltwater and freshwater, on a poster. He colored the ocean water blue and the river water yellow. Which would be the best color for him to use to visually represent the estuary?
Green
When reading water level in a graduated cylinder, do you look at the top curve or the bottom of the curve?
Bottom (the meniscus)
Where is most of the MASS of an atom located?
The Nucleus
Is air (N2 + O2 + CO2) considered an element, a compound, or a mixture?
Mixture
An atom of Carbon has an atomic number of 6 and an atomic mass of 12. How many neutrons does it have?
6