Answer the following question given this paragraph: Electric substations have several functions. Many substations distribute electricity from a few high-voltage lines to several lower-voltage lines. They have electric transformers, which use electromagnetic induction to change the voltage of the current. Some transformers increase the voltage; others decrease the voltage. In the Figure below , you can see how both types of transformers are used in an electrical grid. Q: Electric substations have what devices, which use electromagnetic induction to increase or decrease the voltage of the current? Choices: - transistors - generators - tubes - transformers A:
transformers
Answer the following question given this paragraph: Brightly colored fruits attract animals that may disperse their seeds. It's hard to miss the bright red apples on these trees. Q: What is an advantage of brightly colored fruits? Choices: - make pretty paintings - dyes for clothing - warning of poisons - attract animals to disperse their seeds A:
attract animals to disperse their seeds
Q: Answer the following question given this paragraph: There are many farming methods that help prevent soil erosion. Q: Many innovative farming methods can prevent what type of erosion, which is especially important in agriculture? Choices: - plains erosion - fertilizer erosion - vegetable erosion - soil erosion A:
A: soil erosion
Question: Answer the following question given this paragraph: Like plants, animals are multicellular eukaryotes. However, animals differ from plants in other important ways. Q: Like plants, animals are multicellular what? Choices: - isolates - prokaryotes - membranes - eukaryotes A:
Answer: eukaryotes
*Question*
Answer the following question given this paragraph: The objects are at different temperatures, and heat flows from the hotter to the cooler object. This is always. Q: In which direction does heat always flow through objects? Choices: - from low to high - from cooler to hotter - from left to right - from hotter to cooler A:
**Answer**
from hotter to cooler
(Q).
Answer the following question given this paragraph: Figure 17.33 Resonance has been used in musical instruments since prehistoric times. This marimba uses gourds as resonance chambers to amplify its sound. (credit: APC Events, Flickr). Q: Resonance has been used in what kind of human-made recreational objects since prehistoric times? Choices: - toys - paintbrushes - arrows - musical instruments A:
(A).
musical instruments