Nature of Science
Sometimes scientists replicate the research of other scientists. Which of the following is the most likely reason scientists do this? A. to form new theories B. to improve the research C. to win prizes for their work D. to verify that the work is accurate
What is D?
Mia made punch for a school picnic. She added sugar, strawberries, raspberries, and mint leaves to soda water. Which of these will dissolve in the soda? A mint leaves B raspberries C strawberries D sugar
What is D sugar?
Miguel is rolling a ball down a hill. This is an example of which form of energy? A.chemical energy B.electrical energy C.mechanical energy D.thermal energy
What is C.mechanical energy?
Which of these materials would be the BEST insulator? A.aluminum B.glass C.gold D.silver
b. glass
A push or pull
What is a force?
Joshua measured the water, sugar, and yeast for his investigation very carefully. Then he wrote the amounts in his notebook. Why did Joshua measure so carefully? A. to practice measuring skills B. to keep records in his notebook C. so others can replicate his work D. to show his records to the teacher
What is C?
Bianca adds 3 tbs of cocoa mix to milk. It does not all dissolve. What could she do to the milk to get the cocoa to dissolve completely? A filter it B heat it C freeze it D evaporate it
What is B heat it?
Solar power is a technology that relies on a renewable energy resource. Solar power changes energy from the Sun into a form of energy that can be used to heat our homes and run household appliances. What form of energy must solar energy be changed into in order to run household appliances? A.chemical B.electrical C.light D.thermal
What is B.electrical?
It is a cold winter day outside. James leaves the heated classroom to go out to recess, but leaves the door cracked open a little bit. What happens to the hot air in the classroom?
The hot air flows outside through the crack in the door.
How do you know when forces are balanced?
When an object stays still
Matthew’s teacher gave the class the first quiz of the year. It was a rainy day. Now, Matthew dislikes rainy days. What word describes Matthew’s feelings about rainy days? A opinion B inference C observation D valid conclusion
What is a) opinion?
Luis’s class is studying how science and cooking are related. They learn that some substances will dissolve in water and others will not. Which of these will NOT dissolve in water? A baking soda B salt C sugar D oil
What is d) oil?
Bobbie is playing with his radio-controlled car by using a handheld remote box. What type of energy is being used to power Bobbie's car? A.chemical energy B.electrical energy C.heat energy D.mechanical energy
What is B.electrical energy
Mandy combs her hair with a plastic comb. This causes the comb to become negatively charged. Which of the following would all be attracted to the comb? A a positively charged object and an uncharged object B a negatively charged object and an uncharged object C a positively charged object and a negatively charged object D a negatively charged object, a positively charged object, and an uncharged object
What is A) a positively charged object and an uncharged object
A girl is standing still on a tennis court, with her racket resting on her shoulder. Her tennis partner just hit a ball to her. Which object is showing the effect of an unbalanced force? a.The girl standing still b. The tennis racket c.The ball d. The ground
c. The ball
In science, we often gather information with our senses by watching, listening, smelling, and touching. For example, in a plant experiment, you may measure the growth of a plant over time. What is this process called? A stating hypotheses B forming conclusions C making observations D performing experiments
What is C?
Damien filled a salt shaker with black pepper instead of table salt. Damien needs to sort the pepper grains from the salt particles. What could Damien do to sort the particles? A Use a magnet to separate the salt crystals from the pepper flakes. B Use a sieve to separate the salt crystals from the pepper flakes. C Add water to dissolve the salt. Then use a filter to remove the pepper, and evaporate the water, leaving the salt behind. D Melt the salt crystals and burn the pepper flakes.
What is C Add water to dissolve the salt. Then use a filter to remove the pepper, and evaporate the water, leaving the salt behind?
Fireworks are popular during celebrations. They light up the night sky and sometimes shake the ground with their explosions. The explosion noises are an example of what type of energy? A. electrical energy B. light energy C. mechanical energy D. sound energy
What is D. SOUND ENERGY?
Megan wants to determine if an electrical circuit has electricity flowing through it. Which of the following evidence is proof that the circuit has an electrical current? A.The circuit is a closed loop. B.A light bulb is lit in the circuit. C.The circuit's switch is in the closed position. D.Wires in the circuit are made of conducting material.
What is B).A light bulb is lit in the circuit.
Cassandra knows that refrigerator magnets use magnetic force to stick. Which of the following is an example of something else that uses a magnetic force? A. a boat B. a compass C. a plant D. a swing
b. a compass
Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured. Identify the manipulated variable.
What is the age of the students
Nathan went swimming at the lake over the weekend. While he was playing on the shore, he found a small chunk of cement and a stick, which appeared to be the same size. What would be the best way for Nathan to compare the volume of the stick and of the chunk of cement? A. Throw them in the lake and see which one will sink. B. Use a ruler to measure the length of each of the objects. C. Place them each on a scale and see which one weighs more. D. Place them in a bucket of water and see which one raises the water level the most.
What is D?
In many electrical factories, fossil fuels are burned to boil water and generate steam. This steam is then used to help generate electricity. What type of energy is given off by the fossil fuels and used to boil the water? A.chemical energy B.heat energy C.light energy D.sound energy
What is B.heat energy?
Jennifer is getting ready for school on a cold day in February. She wants to make sure her hair is completely dry before she leaves her house. She plugs her hair dryer into the wall outlet and turns it on. Which of the following describes one of the steps involved in using energy to dry Jennifer's hair? A.Thermal energy is changed into mechanical energy, which makes the motor in the hair dryer move. B.Electrical energy is changed into heat energy, which makes the motor in the hair dryer move. C.Mechanical energy is changed into heat energy, which makes the motor in the hair dryer move. D.Electrical energy is changed into mechanical energy, which makes the motor in the hair dryer move.
What is D).Electrical energy is changed into mechanical energy, which makes the motor in the hair dryer move.
A toy car rolling along different surfaces will experience different amounts of friction. The toy car would encounter the most friction when rolling on which of the following surfaces? A.a sandy beach B.a sheet of glass C.a smooth wooden board D.a piece of construction paper
a. sandy beach