All flashcards
Flashcard 1: Which option is not a light source: the Sun or a book?
Answer: A book. Books reflect light but don't produce it.
Flashcard 2: Which option is a light source: a flashlight or a rock?
Answer: A flashlight. Flashlights produce light; rocks do not.
Flashcard 3: What is the term for light bouncing off an object and traveling to your eyes?
Answer: Reflection. Light bounces off surfaces and travels to our eyes.
Flashcard 4: Identify the correct statement: The Moon makes light or the Moon reflects light from the Sun.
Answer: The Moon reflects light from the Sun. The Moon shines by reflecting sunlight, not making its own.
Flashcard 5: Choose the best evidence statement: "It is dark" or "I cannot see the pencil when the light is off".
Answer: "I cannot see the pencil when the light is off.". Specific observations provide better evidence than general ones.
Flashcard 6: Which option is correct: Objects are seen because light enters the eyes or because sound enters the eyes?
Answer: Objects are seen because light enters the eyes. Light rays must reach our eyes to create vision.
Flashcard 7: Which option is the best way to record evidence: write "seen/not seen" or write "cool"?
Answer: Write "seen/not seen" (or similar observations). Objective observations provide scientific evidence.
Flashcard 8: What is the correct claim supported by evidence from a light test with a lamp and a toy?
Answer: Objects can be seen only when light is present. This conclusion matches the evidence from light experiments.
Flashcard 9: Which option is true about shadows: They form when light is blocked or when light is added?
Answer: They form when light is blocked. Objects block light, creating dark areas called shadows.
Flashcard 10: What tool can you use to record evidence about light and what you can see?
Answer: A simple observation chart or table. Charts help organize and display test results.
Flashcard 11: Which observation best shows evidence: "I can see the toy with a lamp on" or "I like the toy"?
Answer: "I can see the toy with a lamp on.". This shows a clear cause-effect relationship with light.
Flashcard 12: What is the name of an object that does not make light and is seen by reflected light?
Answer: A non-light source. These objects need light from other sources to be visible.
Flashcard 13: What is the name of an object that makes its own light, such as the Sun?
Answer: A light source. These objects produce their own light energy.
Flashcard 14: Identify the correct conclusion: If an object is not visible, then light is absent or light is always present.
Answer: Light is absent (or not reaching the object/eyes). No visibility means no light is reaching your eyes.
Flashcard 15: What must be present for your eyes to see most objects clearly?
Answer: Light must be present. Without light, our eyes cannot detect objects.
Flashcard 16: Which is the correct evidence statement: 'I saw it in the dark' or 'I saw it when light was on'?
Answer: I saw it when light was on. This statement shows light was present during observation.
Flashcard 17: Which option is true about the Moon: it makes light or it reflects light?
Answer: It reflects light. The Moon shines by reflecting sunlight, not making its own.
Flashcard 18: What is an example of an object that does NOT make its own light?
Answer: A book (it reflects light). Books are visible only by reflecting light from other sources.
Flashcard 19: Identify the light source: a flashlight, a rock, or a pencil.
Answer: A flashlight. Flashlights produce light; rocks and pencils don't.
Flashcard 20: What is the best description of darkness in terms of light?
Answer: Darkness is little or no light. Darkness occurs when light is absent or very weak.
Flashcard 21: Which option best completes the rule: No light, no .
Answer: No light, no seeing. This simple rule shows light is essential for vision.
Flashcard 22: What must happen for your eyes to see an object clearly?
Answer: Light must reach your eyes from the object. Eyes detect objects by receiving light from them.
Flashcard 23: What is the main idea about seeing objects and light?
Answer: Objects can be seen only when light is present. Without light, our eyes cannot detect objects.
Flashcard 24: Which observation is stronger evidence: 'It is cool' or 'I could not see it with lights off'?
Answer: I could not see it with lights off. This directly shows darkness prevents seeing.
Flashcard 25: What is the safest way to test seeing in low light in a classroom?
Answer: Dim lights and use a flashlight; do not run. Safety first: controlled lighting prevents accidents.
Flashcard 26: Choose the correct conclusion: You turn off the lamp and cannot see the book. What does this show?
Answer: Light is needed to see the book. No visibility in darkness proves light requirement.
Flashcard 27: Which statement is an observation (not an opinion): 'The room is dark' or 'Dark is scary'?
Answer: The room is dark. Observations describe facts; opinions express feelings.
Flashcard 28: Which choice best describes why a black cat is harder to see in dim light?
Answer: Less light reflects to your eyes. Dark objects reflect less light, making them harder to see.
Flashcard 29: Identify the best test: How can you check if light is needed to see a toy?
Answer: Compare seeing it with light on versus off. Testing both conditions proves light's necessity.
Flashcard 30: Identify the best conclusion if you can see a ball only when sunlight shines on it.
Answer: Sunlight helps you see the ball by lighting it. The ball reflects sunlight to your eyes.