Science Concepts Overview

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Questions and Answers

Which factor does not directly influence climate?

  • Latitude
  • Altitude
  • Atmospheric pressure
  • Longitude (correct)

What vision condition makes distant objects appear blurry?

  • Astigmatism
  • Myopia (correct)
  • Hyperopia
  • Presbyopia

In a convex mirror, how are light rays reflected?

  • Parallel after reflection
  • Reflected back on themselves
  • Converge after reflection
  • Diverge after reflection (correct)

Which best describes the main function of the respiratory system?

<p>Providing oxygen to the blood and removing carbon dioxide (A)</p> Signup and view all the answers

What is the primary function of the liver?

<p>Storing glycogen and processing toxins (C)</p> Signup and view all the answers

What effect do carbon dioxide and methane have on the environment?

<p>Trapping heat in the atmosphere, contributing to climate change (B)</p> Signup and view all the answers

What is the role of phloem in plants?

<p>Transporting sugars from leaves (C)</p> Signup and view all the answers

In the reaction of an acid with a base, what are the resultant products?

<p>Salt and water (A)</p> Signup and view all the answers

Flashcards

Climate Influencers

Climate is influenced by altitude and latitude but not longitude.

Myopia (Nearsightedness)

A condition where distant objects appear blurry; corrected with glasses or surgery.

Convex Mirror

A mirror that curves outward, reflecting light rays outwardly.

Circulatory and Respiratory Systems

Circulatory system transports oxygen; respiratory system supplies it to blood.

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Greenhouse Gases

Carbon dioxide (CO2) and methane (CH4) trap heat and contribute to climate change.

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Ion of Sodium

Sodium ion (Na⁺) forms when sodium loses an electron, resulting in a positive charge.

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Acid-Base Reaction

Mixing an acid (HCl) with a base (NaOH) produces salt (NaCl) and water (H₂O).

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Xylem vs. Phloem

Xylem transports water; phloem transports nutrients like sugars.

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Study Notes

Climate Factors

  • Longitude does not directly affect climate; it primarily determines time zones.
  • Climate is influenced by altitude and latitude.

Eye Conditions

  • Nearsightedness (Myopia): Distant objects appear blurry; corrected with glasses, contacts, or surgery.
  • Farsightedness (Hyperopia): Close objects appear blurry; corrected with glasses or contacts.

Mirrors

  • Convex Mirrors: Curve outward; reflective surface faces outward; light rays diverge after reflection.

Systems Interaction: Circulatory and Respiratory

  • The circulatory system carries oxygen and nutrients to cells.
  • The respiratory system provides blood with oxygen and removes carbon dioxide.
  • These systems work together to maintain oxygenated blood flow.

Body Organs

  • Esophagus: Muscular tube connecting throat to stomach.
  • Liver: Located below the diaphragm; processes toxins; produces bile; stores glycogen.

Environmental Impact of Gases

  • Carbon Dioxide (CO2) and Methane (CH4): Greenhouse gases trapping heat, causing global warming and climate change.

Elements and Ions

  • Sodium (Na): Atomic diagram shows one valence electron.
  • Sodium Ion (Na⁺): Forms by losing the valence electron, acquiring a positive charge.

Chemical Reactions

  • Acid-Base Reaction (Neutralization):
    • Acid (HCl) + Base (NaOH) → Salt (NaCl) + Water (H₂O)

Mixtures of Acids and Bases

  • Mixing an acid (e.g., HCl) and a base (e.g., NaOH) results in a neutralization reaction producing salt (e.g., NaCl) and water (H₂O).

Plant Tissues

  • Xylem: Transports water and minerals from roots to leaves.
  • Phloem: Transports sugars and other nutrients from leaves to other parts of the plant.

Plant Support

  • Roots: Anchor the plant in soil, providing stability.
  • Stem: Supports the plant and allows it to stand upright.

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