اختبار تجريبي (5) لمادة العلوم للصف الثاني متوسط الفصل الدراسي الثاني لعام 1438-1439 ه

الإخصاب is the correct answer because it translates to "fertilization" in English. Fertilization is the process in which the sperm and the egg unite to form a zygote, which eventually develops into an embryo.

التكاثر هو عملية مستمرة تحافظ على بقاء الحياة على الأرض واستمرارها. التكاثر هو عملية تنتج من خلالها الكائنات الحية نسلها الجديد، وهذا يساهم في تواجد تنوع الكائنات الحية واستمرار الأنواع على الأرض. من خلال التكاثر، يتم توالد الأفراد الجدد الذين يحملون الصفات الوراثية من الأجيال السابقة، وهذا يسهم في تطور الأنواع وتكيفها مع بيئتها وتغيراتها.

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جهاز الغدد الصماء والجهاز العصبي هما جهازا السيطرة في الجسم. (The endocrine system and the nervous system are both control systems in the body.)

The correct answer is "الأربطة" (ligaments). Ligaments are the structures that connect bones together in a joint. They provide stability and support to the joint, allowing for movement while preventing excessive or abnormal motion.

The correct answer is "الجلد" (the skin). The skin serves multiple functions, including protection and sensory response. It acts as a barrier against external threats, such as bacteria and UV radiation, and helps regulate body temperature. Additionally, the skin contains sensory receptors that allow us to perceive touch, pressure, temperature, and pain.

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من مميزات النباتات البذرية أن لها أوراق وجذور وسيقان ونسيج وعائي.

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The correct answer is "الحيوانات المنوية". This is because the phrase "الحيوانات المنوية" translates to "sperm cells" in English, which are the male reproductive cells involved in sexual reproduction.

The correct answer is "الغدد" which means "glands" in English. Glands in the body play a role in adapting to psychological stress. They release hormones such as adrenaline and cortisol which help the body respond to stress by increasing heart rate, blood pressure, and energy levels.

The given statement defines "الطيف الكهرومغناطيسي" which translates to "electromagnetic spectrum" in English. It refers to the complete range of electromagnetic frequencies and wavelengths.

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العظام تحمي الأعضاء الداخلية. (Bones protect the internal organs.)

The correct answer is "الموارد المتجددة" which translates to "renewable resources" in English. This answer is appropriate because it accurately describes a natural resource that can be recycled or continuously renewed in nature. Renewable resources are considered sustainable as they can be replenished over time, unlike non-renewable resources such as fossil fuels.

The correct answer is "ذيل الحصان" because it is the only option that fits the description given in the question. The question states that this plant has a unique stem structure that is hollow and surrounded by a ring of vascular tissue, and it also contains nodes. "ذيل الحصان" is the only option that matches these characteristics.

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