2Mg + O2--->MgO
In the equation above, how many atoms are in the oxygen molecule?
2
Which step in the digestive process represents a chemical change in food?
a.Storing of swallowed food in the stomach
b.Churning of food, liquids, and digestive juices in the stomach
c. Movement of food down the esophagus to the stomach
d. Substances in the mouth and stomach breaking down fats and proteins
d. Substances in the mouth and stomach breaking down fats and proteins
A student who was training for a cross country race jogged for 2.0 hours and covered a distance of 14.0 kilometers. What was the average speed of the student?
7.0 km/hr
student is standing with their back facing a campfire. The student notices that their back ismuch warmer than their chest. They know that thermal energy is being transferred from thefire and that this method of energy transfer can happen even if no air is present.
This method of energy transfer is —
radiation
How Many NBA Championships Did Michael Jordan Win With The Chicago Bulls?
6
The chemical formula for baking soda, a common household chemical, is NaHCO
. How manyelements are in this compound?
4
Which of the following examples includes only chemical changes that occur in the digestive process?
A. Absorption of nutrients by villi in the small intestines
B. Chewing and swallowing food
C. Recycling of water from dissolved food back into the body
D. Reaction of saliva, stomach acid, bile, and pancreatic juices with food
D. Reaction of saliva, stomach acid, bile, and pancreatic juices with food
What is the formula for speed?
S= D/T
A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening.They know that the cup of hot chocolate transfers thermal energy to the surrounding air. Theheated air over their cup of hot chocolate expands and rises and is replaced by cooler, denserair.
This method of energy transfer is —
Convection
In the Netflix series "Stranger Things," what is the name of the city the story takes place?
Hawkins
How many total atoms are in Glucose? C6H12O6
24
In a salt water solution, where salt is dissolved in water, the salt is which portion of the solution?
solute
__________ refers to how fast the runner is moving based on the total distance of400 meters regardless of direction.
Speed
An ice cube is placed onto a hot pan that is sitting on the counter top.
How will the thermal energy move?
The heat will travel from the pan to the ice cube.
"Who lives in a pineapple under the sea?"
Spongebob Squarepants
Which of the following statements are characteristics of a compound?
I. Compounds are made from two or moreelements.
II. A compound is a pure substance.
III. Compounds are represented by a chemicalsymbol.
IV. Compounds are represented by a chemicalformula
I,II,IV
In a lab experiment, students are adding salt to water. The product is salt-water.
What is the solvent in the lab experiment?
________ takes into account the displacement and direction of the runner.
Velocity
A beaker with water is placed on a hot plate to increase the temperature of the water.
What forms of energy transfer occur while the hot plate is turned on?
Conduction occurs where the hot plate touches the beaker. Convection occurs in the movement of the water.
What popular video game has featured cameos from rappers such as Snoop Dog and Travis Scott
Fortnite
Which of the following statements are characteristics of an element?
I. Elements are made from a mixture.
II. An element is a pure substance.
III. Elements are represented by a symbol.
IV. Elements make up matter on Earth.
II,III,IV
Students are conducting a solubility experiment in science class. Baking soda is added to water.
What is the baking soda
Solute
A toy car rolls down a ramp and slows to a stop on a flat surface. What force is primarily responsible for stopping the toy car?
Friction
A student is investigating how thermal energy moves. The student heated a nail to 100°Cand placed it into 250 mL of 20°C water.
Based on your experience, what will happen to the thermal energy of the water and the nail?
The nail will transfer energy to the water until the water and nail have an equal temperature.
How many tattoos does Coach Low have?
16