Physical Science - 1st Grade Science

A magnet can stick to metals that are made of iron, cobalt, or nickel. A magnet cannot stick to plastic, wood, rubber, and many other non-metal objects.

Looking at our answer choices, a paperclip, nail, and nickel are all made out of metals that are magnetic. A tennis ball is rubber and fabric, which are not magnetic materials, so it will not stick to a magnet.

A magnet can stick to metals that are made of iron, cobalt, or nickel. A magnet cannot stick to plastic, wood, rubber, and many other non-metal objects.

A basketball, stick, and bouncy ball are not made out of metal, so they will not stick to a magnet. A paperclip is made out of a magnetic metal so it will stick to a magnet.

A magnet can stick to metals that are made of iron, cobalt, or nickel. A magnet cannot stick to plastic, wood, rubber, and many other non-metal objects.

A baseball, stick of gum, and rubber band are not made out of metal, so they will not stick to a magnet. A paperclip is made out of a magnetic metal so it will stick to a magnet.

A flashlight is a human-made object, so this gives us evidence or proof that humans can make light sources. The Sun and lightning are both natural sources of light, so nature, not humans, created them.

The candles on the top illuminate this cake. From the picture, we can observe that the only source of light is coming from the candles, and without them, it would be dark. The background of the picture is dark, so there are no other sources of light.

The sentences that provide evidence of a light source are necessary are, "Once the cave was illuminated with the flashlight, she saw there were tons of snakes! The flashlight went out, and it was dark again.". These sentences explain that once the flashlight illuminated or light up the cave, she could see the snakes. It also states that it went dark again when the flashlight went out. This shows readers that the flashlight is where the light came from and was needed to see in the darkness.

Providing evidence is like giving proof of something or for something. In this short passage, two sentences show us how light is needed to illuminate and see objects in the dark. "When she gets outside, it is so dark she can't even see her feet! She turns on the lantern and can see all the bugs crawling on the roots of a tree." The first sentence lets us know it is dark, and she cannot see anything, not even her feet. In the second sentence, she illuminates the area around her with the lantern so she can see the bugs and roots. These sentences show that light is necessary to see.

Andrew should choose the flashlight if he wants to get an item to help him see. A lightbulb will not work without electricity, so holding it up outside will do nothing. A candle will give off light to reflect off objects but only for a short distance, and he is on the end of a very long sidewalk. A flashlight would help him see the long-distance that is needed. It will reflect light off of the objects in the dark so he can see what is around him and if his friend is coming.

Humans can only see objects when they are illuminated by something that gives off or produces light. Fireworks do both of these things, so they help to light up the night sky and other objects around them. While waiting for a firework show, you may notice it is dark and hard to see the people around you; when the fireworks explode, you can see the people around you more clearly.

This is a true statement. Humans have limited vision in the darkness; we need a light to help us. All of the items listed would be helpful in the dark. This claim is based in fact.

This statement is based on an opinion. The phrasing "I think" is a big clue that this is not an evidence-based account. If it were, there would be facts, data, observations, and no personal thoughts.

This statement is evidence-based. The author includes information about testing their theory with different light sources and used a scientific process to do the tests. There is no mention of personal thoughts or opinions.

This is an evidence-bassed statement because there is no personal opinion mentioned, and the writer collected data to conclude. Using data is a form of evidence that helps support a conclusion.

This statement is true. Objects cannot be seen if it is dark. There has to be light from an outside source, or the object has to produce its own light to be seen.

The light must reflect off the surface and enter the eye to be seen. An object will not be seen in darkness because there is no light reflecting off of the object's surface.

Nancy could not see her shoes in the dark closet because humans cannot see when there is no light. The light must shine on an object and reflect into our eyes for us to see the object clearly, or it must make its own light. Shoes cannot make their own light, and the back of the closet was too dark for her to see.

The word illuminate means to light something up. Humans have good vision, but we do not see well at night because there is limited light. Our eyes rely on light to reflect off the surface of an object so that we can see.

The best choice to illuminate (or light up) a dark room would be a lantern. A radio would give off little to no light, and a small candle would only produce enough light to see a few inches ahead of you. A lantern would give off much more light and help you to see in the dark.

A glow stick produces its own light. You can use a glow stick to illuminate a small dark area or to make yourself more easily seen at night time. Glow sticks make their own light when two chemicals are mixed after snapping or shaking the stick.