Julian designs an experiment to see how well different liquids lubricate wooden surfaces. he sets up a number of identical wooden ramps and prepares to slide identical wooden blocks down them. he will time how long it takes each block to reach the end of the ramp. he covers one ramp with water, the second with motor oil, and the third with corn syrup. what can julian use as a control group for the experiment? a. a ramp with no liquid on it b. a second set of ramps covered with water, oil, and syrup respectively c. a ramp with no friction on its surface d. a block that drops straight down instead of sliding down a ramp

What is the average speed of a car that traveled 300.0 miles in 5.5 hours

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity

Me brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula.5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects.8. describe the planets’ orbits around the sun.9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets.13. what causes the seasons?