States of Matter
What is matter?
Anything that has mass and takes up space
Ms. LaPlaca is conducting an experiment to determine how the amount of sunlight affects the growth of a plant.
What is the INDEPENDENT VARIABLE?
The amount of sunlight the plant gets
List the three phases of matter in order from the GREATEST ATTRACTIVE FORCES between particles to the LEAST ATTRACTIVE FORCES between particles.
Solid -> Liquid -> Gas
Which group are the noble gases in?
Group 18
We use a thermometer to measure this kind of energy
Thermal Energy
What is mass?
The amount of matter something has
Ms. LaPlaca wanted to see if increasing the amount of salt in a plant's water will affect the plant's height.
What is the DEPENDENT VARIABLE?
The plant's height
All matter is made up of
Atoms
What is an atomic number?
the number of protons an atom has
Describe the relationship between kinetic energy and thermal energy in an object
The MORE kinetic energy, the MORE thermal energy
What is the smallest unit of matter?
An atom
Ms. LaPlaca is conducting an experiment to determine how the amount of sunlight affects the growth of a plant.
List two CONSTANTS (these stay the same to make the experiment fair)
Answers NOT accepted:
- the amount of sunlight
- the height of the plant
Iron (Fe) is a(n)
Element
Which element on the periodic table has the atomic number 24?
Chromium (Cr)
Describe what happens to the density of air as its temperature lowers (gets cooler)
The density increases, causing the cool air to sink
After a chemical reaction, the mass of the reactant (before reaction) and the mass of the product (after the reaction)____
Stays the same
Ms. LaPlaca is conducting an experiment to determine how the amount of sunlight affects the growth of a plant.
Hours of Sunlight (hours) Height (cm)
12 hours 12 cm
24 hours 30 cm
36 hours 40 cm
What were the results of this experiment?
The more sunlight the plants got, the more growth they experienced
NaCl (Sodium Chloride) is considered a
Compound
Based on its position in the Periodic Table, at room temperature, cadmium (Cd) is most likely a
Metal
Ms. Rivera's science classroom is always hot in the afternoon after recess. Using the concept of RADIATION, explain why this could be the case
Acceptable answers:
- The heaters are radiating thermal energy into the classroom
- The sun is radiating thermal energy through the window
This property of matter describes how much mass is contained in a given volume and is calculated using the formula mass divided by volume.
Density
In an experiment testing how the amount of sunlight affects the growth of a plant, this is the variable that the scientist measures to determine the outcome.
The DEPENDENT variable
Destiny combines sand and salt in a beaker. This is considered which kind of mixture?
Heterogenous
Why do some chemical symbols not match their names?
The names were originally in Latin
Why can't thermal energy move through space by conduction and convection?
There are no particles in a vacuum (space) and so the particles cannot bump into each other (conduction) or flow (convection)