Safety
What should you wear to protect your eyes when doing an experiment?
Safety goggles
What organelle is known as the powerhouse of the cell?
Mitochondria
What happens to an atom when it gains or loses electrons?
It becomes an ion.
What force pulls objects toward the earth?
Gravity
What is the only planet in our solar system that rotates clockwise?
Venus
What should you do if you accidentally spill a chemical on your skin?
What process do plants use to convert light energy into chemical energy?
Photosynthesis
How many periods are there in the periodic table? (Hint: rows)
Seven!
What type of energy does a moving object have?
Kinetic energy
Which animal has three hearts?
Octopus
WHY should you never smell a chemical directly from its container?
You could inhale harmful fumes. Use the proper wafting technique instructed.
What is the main function of the cell membrane?
It controls what enters and leaves the cell.
How many elements are in group 18, and what do these elements have in common?
They are the noble gases, and 7 elements.
You turn on a flashlight, what energy transformation mainly happens?
Chemical energy -> electrical energy -> light energy
Which part of the human body contains the smallest bones?
The ear
During an experiment, a small fire starts in a container. What should you do first?
Alert the teacher immediately and follow the lab emergency/fire procedure.
A plant is placed in a dark room for several days. What process will be most affected and why?
Photosynthesis, because the plant needs light energy to make glucose.
An atom has 11 protons, 11 electrons, and 12 neutrons. What element is it, and what is its mass number?
Sodium (Na), with a mass number of 23.
A car and a bicycle are moving at the same speed. Which one has greater momentum, and why?
The car, because it has greater mass. Momentum depends on both mass and velocity.
What animal is known to have blue blood?
Horseshoe crab.
During a lab, a student notices that a chemical bottle is unlabeled. They assume it is water and use it in their experiment. What are two safety problems with this, and what should they have done?
- never assume an unlabeled chemical is safe, or guess.
- ask a teacher is the chemical is safe to handle
A cell has a lot of mitochondria but very few ribosomes. What would you expect this cell to be especially good at, and what would it struggle with?
It would be good at producing energy (ATP) but would struggle to make proteins.
An element is in group 17, and period 3 of the periodic table. What element is it, and how many valence electrons does it have?
Chlorine (Cl). It has 7 valence electrons.
A cyclist suddenly stops pedaling, but the bike keeps moving forward for a while. What law of motion explains this?
Newton’s first law (law of inertia)
What animal can survive being frozen for months and then come back to life?
The wood frog