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Fill in the blanks to complete the passage. If you have ever seen a golf ball, you know it is a small round ball with a lot of little ridges or holes on it. Those ridges or holes are called dimples. Golf balls were not always made with dimples . The first golf balls were made from leather. They were stuffed with goose feathers . Some people called them featheries. All balls were made by hand and very expensive to buy. In the 1840s, the guttie ball was introduced. It was made of rubber. In the 1880s, the gutties began to be made with patterns on the balls. The most popular pattern was called Bramble. It was a series of bumps in circles on the balls. The bumps became popular because golfers realized that scratches and bumps on the surface helped the ball travel further. In the early 1900s, the golf balls golfers use today were first developed. They were made of two halves fused together so they had air in the middle. This made them lighter and helped them travel further. Companies then added the dimples to make the balls able to travel even further and much faster. Why do dimples make the balls travel faster and further? They create multiple layers of air around the ball. One layer moves faster than the other, which helps increase the ball's speed. Most golf balls today have between 300 and 500 dimples. Companies are constantly testing the number, depth, and position of the dimples to try to make sure they have the best golf ball available for every golfer. Some golfers may want a ball with more dimples. Some may want a ball with fewer dimples. It all depends on how they play the game.
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The author says there are three types of muscles: heart, skeletal, and smooth.
Cardiac muscles are related to the heart, skeletal muscles give your body power and strength, and smooth muscles are involuntary muscles that are always working behind the scenes.
Based on these descriptions, eye muscles are most likely...
cardiac muscles
skeletal muscles
smooth muscles
special muscles
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What detail about roller coasters does the author NOT mention?
the design of the track
the energy used while in motion
the force acting upon the coaster
the safety features of the coaster
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The Olympic Rings were inspired by the Olympics in Ancient Greece.
True
False
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Based on the passage, you can infer that which color of hair appears first?
Gray hair
White hair
When you look up into the sky, sometimes you can see stars. The number of stars you can see depends on the number of clouds in the sky. It also depends on the amount of light pollution. It even depends on the strength of your eyes. In most places, on a clear evening, you can see thousands of stars. Some of the stars sit alone in the sky . Others are part of constellations. Whatever you see, it is only a small sampling of the stars that exist in the universe. How many stars are in the universe? Scientists don't have an exact answer. The universe is made up of galaxies . Scientists guess there are over 100 billion galaxies in the universe. Some galaxies are small. Some galaxies are large . The number of stars in each galaxy varies, but it's safe to say that each galaxy has at least one star. That means there are over 100 billion stars in the universe. In fact, there are over 300 billion stars in the universe . How do scientists know? Because the galaxy we live in, called the Milky Way, has over 300 billion stars alone. When you look up in the sky and see a few thousand stars, you're actually only looking at a small number of the over 300 billion stars in the galaxy and trillions, zillions, or possibly even gazillions of stars in the entire universe.
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Which word is the best synonym for PIGMENT as it is used in the passage?
dye
tone
hue
shade
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The author hints that to see how snowflakes are really different, you should look at them using a...
magnifying glass
measuring tape
microscope
macroscope
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A person with brown hair will likely have a lot of
in the hair.
melanin
eumelanin
phaeomelanin
honeymelanin
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Based on the passage, you can infer that if roller coaster loops were made in perfect circles, the force...
would be too high and uncomfortable to riders
would not be hard enough to keep the cars on the track
would cause the cars to come off the track because of the strength
would make the car speed up as it went through the loop and along the rest of the track
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When it comes to roller coasters, which statement best describes how hills are connected to energy?
Hills help slow down the amount of energy a roller coaster car builds, making it easier to stop.
Hills help a roller coaster car build and release energy as it moves along the track.
Hills help create a lot of energy to keep the roller coaster car constantly moving.
Hills help secure the roller coaster car to the track so riders stay safe
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After reading the passage, which type of scientists do you think the author consulted to get the information about snowflakes?
Physicists who deal with force and motion
Chemists who deal with elements and atoms
Biologists who deal with plants and animals
Geologists who deal with rocks and the land
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Which way does a toilet flow in the southern hemisphere?
Clockwise
Counterclockwise
It depends on the toilet
Both ways at once
What's the strongest muscle in the human body? That question is actually difficult to answer. The human body has three different kinds of muscles (cardiac, skeletal, and smooth) and there are hundreds of muscles in the body. Each muscle works to help make the body strong as a whole. However, there are a few muscles that do more work than many of the others. Eye Muscles The muscles in your eyes, particularly the muscles on the outside of your eyes do a lot of work. These external muscles help your eye adjust its position so it can keep a steady gaze. They can move over 10,000 times in an hour. That's a lot of work! Gluteus Maximus The gluteus maximus is a large muscle. In fact, it's the largest in your body. It helps to keep your body upright and controls your posture. It also works against gravity, which means it has to be very strong. Heart Many people think the heart is your strongest muscle because it works the hardest. Your heart pumps blood 24 hours a day. During your lifetime, it can beat over 3 billion times . It's what helps keep you alive. Masseter The masseter is a muscle in your jaw. It helps you close your teeth with tremendous force. Soleus Below your calf muscle is your soleus. This muscle helps you walk, run, and dance. It works against gravity to help you stand up and requires a lot of strength to keep you moving. Tongue Your tongue is always at work, even when you think it's not. Your tongue is actually a group of muscles. It helps you speak, it helps you process foods, and all day long it helps move saliva around in your mouth and down your throat. All of the muscles in your body work very hard to help make sure everything runs smoothly. Which muscle do you think is the strongest of them all?
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According to the author, which muscle works the hardest?
The gluteus maximus
The masseter
The heart
The eye muscle
Have you ever heard the word doppleganger? Doppleganger is a German word . It means a look-alike of a person. Has someone ever told you that you look like someone else? If you really do, you could be that person's doppleganger. A doppleganger is sort of like an identical twin. The person looks so much like you that many people cannot tell you apart. Some scientists think that everyone has a twin somewhere in the world. If it is true, finding your twin could be hard . After all, there are billions of people in the world . One Canadian photographer named Francois Bruenelle has decided to help find their twins. He looks for people who look almost identical. Then he takes their pictures. These people have never met before. They are not related . However, it is hard for people to tell them apart in Bruenelle's photos. Do you believe you have a doppleganger out there somewhere? If so, keep your eyes peeled. You can't find your twin if you don't look.
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In the passage, currants are treated most like...
almonds
raisins
butter
puff pastry
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What did scientists in the past think absorbed the water?
Dead skin
Sebum
Toes
Follicles
Have you ever heard the word doppleganger? Doppleganger is a German word . It means a look-alike of a person. Has someone ever told you that you look like someone else? If you really do, you could be that person's doppleganger. A doppleganger is sort of like an identical twin. The person looks so much like you that many people cannot tell you apart. Some scientists think that everyone has a twin somewhere in the world. If it is true, finding your twin could be hard. After all, there are billions of people in the world . One Canadian photographer named Francois Bruenelle has decided to help find their twins. He looks for people who look almost identical. Then he takes their pictures. These people have never met before. They are not related . However, it is hard for people to tell them apart in Bruenelle's photos. Do you believe you have a doppleganger out there somewhere? If so, keep your eyes peeled. You can't find your twin if you don't look.
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In the cornbread recipe, what do you do just before adding the milk?
Add the sugar
Sift the meal, flour, baking-powder, and sugar
Add the egg-yolks
Bake in a hot oven