Scientific Method
Experiments and Variables
Measurement
Chemistry
Phase and Phase Changes
100
Which step of the scientific method involves collecting information using the senses?
Making Observations
100

What are the two primary types of variables in an experiment?

Independent and Dependent Variables

100
What is defined as the amount of matter in an object?
Mass
100
What are the three subatomic particles in atoms and what are their charges?
protons, positive; neutrons, neutral; electrons, negative
100
What are the three phases of matter and the four most common phase changes?
Phases of Matter: Solid, Liquid, Gas Phase Changes: Freezing, Condensing, Boiling/Evaporating, Melting
200

What safety precautions should be taken in the lab? A) Review saftey rules B) Read the whole procedure carefully before beginning C) Ask questions when you do not understand something D) All of the above E) None of the above

D

200

What axis does the DV (dependent variable) go on? What axis does the IV (independent variable) go on?

DV goes on the Y axis IV goes on the X axis

200

What tools would a scientist use to measure mass?

A triple beam balance (less precise), a digital balance (more precise)

200
What two pieces of information do you need to know to find the number of neutrons in an atom? How do you calculate it?
You need the Atomic Mass and the Atomic Number. You subtract the Atomic Number from the Atomic Mass (Atomic Mass-Atomic Number)
200
Rank the three states of matter based on the kinetic energy of their molecules, starting with the least energetic.
Solid, Liquid, Gas
300

Stacy walks into the classroom and notices there are 4 white boards in the room. What type of observation is this?

Quantitative Observation

300

What must every good experiment have, so they can compare their data to normal conditions?

A Control Group (the group that receives no treatment)

300
Ranks the following prefixes in terms of size, from biggest to smallest: milli, kilo, centi,
Kilo Centi Milli
300
What type of elements bond to create a covalent bond? What about an ionic bond?
Covalent--Two Non Metals Ionic--A Metal and a Non Metal
300
You take a cold water bottle from the fridge and put it on a table in a hot room. In a few moments you notice beads of water on the outside of the water bottle. What process is happening?
Condensation
400
When getting in his car in the morning, Devante notices that his car, which is black, is very hot. As he drives to school he wonders if all dark cars get this hot, compared to light colored cars. What step of the scientific process is Devante going through?
Ask A Question
400
Kissary is conducting an experiment to see how fertilizer affects plant growth. She has four of the same plant that she places in the same window and gives the same amount of water to. Each plant gets a different amount of fertilizer, but the same soil. Kissary then measures the plants growth. What is one constant variable in this experiment?
Amount of Sun, Amount of Water, Type of Plant, Same type of soil.
400
Albert has 57 mL of water in his graduated cylinder to begin with. He then places a ring in the graduated cylinder and records a measurement of 72 mL. What method is Albert using and what is the volume of the ring? Be sure to use the correct units!
Albert is using the water displacement method. The ring is 15 mL.
400
What atomic particle is responsible for forming bonds between atoms?
Electrons
400
What happens to the temperature of a substance as it undergoes a phase change?
It stays constant until the phase change is complete.
500
During a science experiment, students notice that their science teacher has set-up rulers on their lab tables. Which statement best describes an inference that could be made from this experiment? A) Rulers are easier to use than tape measures when measuring length. B) The science experiment must involve measuring length since rulers are present. C) There are rulers set-up in the science classroom D) None of the above
B
500
Miguel suggests that his class do an experiment to see if different types of dog food affect the dogs energy level. He says that they should test two different types of dog food on male and female dogs for two weeks. What is wrong with Miguel's experiment?
He has too many independent variables (both multiple dog food types and different gender dogs)
500
Daj'ah and Tanzania have collected several measurements for a block of wood: -length: 2 cm -width: 4 cm -height: 8 cm -mass: 192 mg What is the density of their cube? Be sure to use the right units!
The cube is 3 mg/cm cubed. The formula for density is D= M/V so you would take 192 mg/ 2cm*4cm*8cm or 192/64 which gives you three.
500
How are the elements in the Periodic Table arranged?
The elements are arranged according to atomic number
500
What is the name for a phase change when a solid turns directly into a gas?
Sublimation
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